https://g8kepr.com/blog Practical guides on API security, MCP security, prompt injection, compliance, and AI infrastructure from the team building G8KEPR. en-US team@g8kepr.com (G8KEPR Team) team@g8kepr.com (G8KEPR) Fri, 01 May 2026 17:09:23 GMT https://g8kepr.com/icon-192.png https://g8kepr.com/blog https://g8kepr.com/blog/threat-patterns-2026-data https://g8kepr.com/blog/threat-patterns-2026-data Tue, 05 May 2026 04:00:00 GMT Based on traffic across G8KEPR-protected deployments: what attackers actually try, how often they succeed without protection, and which attack categories are growing fastest. Real numbers from real production systems. Security https://g8kepr.com/blog/ai-security-checklist https://g8kepr.com/blog/ai-security-checklist Sun, 03 May 2026 04:00:00 GMT A comprehensive checklist for teams deploying AI APIs in production. Covers input validation, output constraints, authentication, rate limiting, audit logging, compliance, and incident response. Use this before your next production launch. Security https://g8kepr.com/blog/agent-hijacking-mcp https://g8kepr.com/blog/agent-hijacking-mcp Fri, 01 May 2026 04:00:00 GMT An AI agent that can be hijacked is not just an AI problem — it is an infrastructure problem. When a model is convinced to misuse a legitimate tool, the damage is real regardless of how the instruction arrived. Here is how hijacking works and how to stop it. Security https://g8kepr.com/blog/mythos-zero-day-analysis https://g8kepr.com/blog/mythos-zero-day-analysis Fri, 01 May 2026 04:00:00 GMT The Mythos project dropped three coordinated zero-day disclosures in Q1 2026 targeting LLM inference APIs. Here is a full technical breakdown of each vulnerability, the attack patterns, and what defenders need to patch right now. Security https://g8kepr.com/blog/nist-ai-rmf-guide https://g8kepr.com/blog/nist-ai-rmf-guide Thu, 30 Apr 2026 04:00:00 GMT The NIST AI Risk Management Framework is the most actionable AI governance document published so far. Unlike the EU AI Act (legal obligations) or ISO 42001 (management system), the AI RMF is an engineering framework. Here is how to implement it for teams running API-exposed AI systems. Compliance https://g8kepr.com/blog/tool-poisoning-attacks https://g8kepr.com/blog/tool-poisoning-attacks Tue, 28 Apr 2026 04:00:00 GMT Tool poisoning is when a malicious MCP server describes its tools in a way designed to hijack the AI model using them. The attack lives in the tool description, not the tool call. Most teams have no detection for it. Security https://g8kepr.com/blog/mcp-design-flaw-200k-servers https://g8kepr.com/blog/mcp-design-flaw-200k-servers Tue, 28 Apr 2026 04:00:00 GMT A fundamental flaw in the Model Context Protocol trust model means most MCP server deployments are vulnerable to tool namespace collision attacks. We analyzed 200K+ public MCP configurations and found 67% have no tool signature enforcement. Security https://g8kepr.com/blog/open-security-posture https://g8kepr.com/blog/open-security-posture Wed, 22 Apr 2026 04:00:00 GMT Most security teams treat their pentest reports as closely guarded secrets. We publish ours. Here is the reasoning, and why we think transparency is a competitive advantage rather than a vulnerability. Security https://g8kepr.com/blog/mtls-service-auth https://g8kepr.com/blog/mtls-service-auth Wed, 22 Apr 2026 04:00:00 GMT Mutual TLS is the strongest authentication mechanism available for service-to-service calls. It is also the most operationally complex. Here is an honest assessment of when mTLS is the right choice and when a well-implemented API key system is better. Architecture https://g8kepr.com/blog/deepseek-breach-lessons-api-security https://g8kepr.com/blog/deepseek-breach-lessons-api-security Wed, 22 Apr 2026 04:00:00 GMT The DeepSeek data exposure incident revealed how quickly unsecured API endpoints in AI infrastructure can become catastrophic leaks. We break down the attack chain and extract six actionable lessons for API security teams. Security https://g8kepr.com/blog/mcp-security-sandbox https://g8kepr.com/blog/mcp-security-sandbox Mon, 20 Apr 2026 04:00:00 GMT Model Context Protocol is the new attack surface. When Claude or GPT-4 calls a tool, that call can be injected, replayed, or exfiltrated. This post covers how G8KEPR sandboxes tool calls, enforces scope, and gives you full audit trails on every AI action. Security https://g8kepr.com/blog/iso-42001-explained https://g8kepr.com/blog/iso-42001-explained Mon, 20 Apr 2026 04:00:00 GMT ISO 42001 was published in December 2023 and is already appearing in enterprise vendor questionnaires. It is the ISO 27001 of AI — a management system standard with certification. Here is what it requires and what it means for teams building and using AI APIs. Compliance https://g8kepr.com/blog/jwt-attack-patterns https://g8kepr.com/blog/jwt-attack-patterns Sat, 18 Apr 2026 04:00:00 GMT JSON Web Tokens are everywhere in API authentication and almost everywhere implemented with at least one exploitable weakness. The attacks have not changed much since 2018 — but the blast radius has grown as JWTs now gate LLM access, agent sessions, and multi-tenant data. Security https://g8kepr.com/blog/llm-jailbreaking-2026-attack-landscape https://g8kepr.com/blog/llm-jailbreaking-2026-attack-landscape Sat, 18 Apr 2026 04:00:00 GMT Research papers are claiming 97% jailbreak success rates against frontier models. Before panicking, understand what these numbers actually measure — and what they mean for teams deploying LLMs in production with user-facing APIs. Security https://g8kepr.com/blog/red-team-run-4 https://g8kepr.com/blog/red-team-run-4 Fri, 17 Apr 2026 04:00:00 GMT We hired an external security firm to attack G8KEPR across every surface — API endpoints, WebSocket channels, MCP sandbox, authentication flows, and the AI pipeline. Here is the full breakdown: 0 Critical, 0 High, 3 Medium, 2 Low — all resolved before go-live. Security https://g8kepr.com/blog/graphql-security-2026 https://g8kepr.com/blog/graphql-security-2026 Wed, 15 Apr 2026 04:00:00 GMT GraphQL's flexibility is also its attack surface. Introspection exposes your schema. Batching enables amplification. Unbounded depth queries can bring down a server. Here is the complete attack taxonomy and how to defend against each vector. Security https://g8kepr.com/blog/pci-dss-4-ai-apis https://g8kepr.com/blog/pci-dss-4-ai-apis Tue, 14 Apr 2026 04:00:00 GMT PCI DSS 4.0 became mandatory in March 2024. The updated requirements have direct implications for teams running AI-assisted payment APIs — particularly around web-skimming, script integrity, and the new customised approach. Here is what changed and what you need to do. Compliance https://g8kepr.com/blog/agentic-ai-attack-surface https://g8kepr.com/blog/agentic-ai-attack-surface Tue, 14 Apr 2026 04:00:00 GMT An LLM that reads information is a data risk. An LLM that can take actions — send emails, modify databases, call APIs, execute code — is an operational risk. The attack surface is fundamentally different and most security models have not caught up. Security https://g8kepr.com/blog/eu-ai-act-enforcement-2026 https://g8kepr.com/blog/eu-ai-act-enforcement-2026 Sun, 12 Apr 2026 04:00:00 GMT The EU AI Act entered full enforcement April 2026. High-risk AI systems now require conformity assessments, mandatory logging, and explainability on automated decisions. Here is what that means for teams running APIs that feed LLMs. Compliance https://g8kepr.com/blog/bola-bfla-explained https://g8kepr.com/blog/bola-bfla-explained Fri, 10 Apr 2026 04:00:00 GMT Broken Object Level Authorization and Broken Function Level Authorization account for more API data breaches than any other vulnerability class. They are also the easiest to introduce and among the hardest to test for comprehensively. Here is how they differ and how to catch them. Security https://g8kepr.com/blog/circuit-breaker-ai-pipelines https://g8kepr.com/blog/circuit-breaker-ai-pipelines Thu, 09 Apr 2026 04:00:00 GMT An LLM API that starts timing out at 5% error rate will cascade to 100% failure within minutes if your application does not have circuit breakers. The pattern is well-understood for microservices — here is how to apply it specifically to AI model calls. Architecture https://g8kepr.com/blog/soc2-controls-that-matter https://g8kepr.com/blog/soc2-controls-that-matter Wed, 08 Apr 2026 04:00:00 GMT After mapping G8KEPR's own controls against the AICPA Trust Services Criteria, we found most teams waste time on low-impact controls while leaving CC6.1 and CC7.2 under-documented. Here is where to focus your first 90 days. Compliance https://g8kepr.com/blog/ai-supply-chain-huggingface-lora-poisoning https://g8kepr.com/blog/ai-supply-chain-huggingface-lora-poisoning Wed, 08 Apr 2026 04:00:00 GMT Researchers demonstrated that fine-tuning adapters on HuggingFace can embed backdoors that activate on specific trigger phrases. With 500K+ public adapters available for download, the AI model supply chain has a trust problem that the ecosystem is only beginning to address. Security https://g8kepr.com/blog/websocket-security https://g8kepr.com/blog/websocket-security Sun, 05 Apr 2026 04:00:00 GMT WebSocket connections bypass most API gateway controls. They persist across requests, skip per-request authentication, and are often excluded from WAF rule sets. If your application uses WebSockets and your security team treats them like HTTP, you have an unchecked attack surface. Security https://g8kepr.com/blog/webhook-security-guide https://g8kepr.com/blog/webhook-security-guide Fri, 03 Apr 2026 04:00:00 GMT Webhooks are the most common unsecured integration point in SaaS architectures. An unverified webhook endpoint accepts any POST request from any source. Here is the complete security implementation: signature verification, timestamp validation, replay prevention, and idempotent processing. Architecture https://g8kepr.com/blog/flipattack-detection https://g8kepr.com/blog/flipattack-detection Mon, 30 Mar 2026 04:00:00 GMT FlipAttack is a prompt injection technique that encodes malicious instructions by reversing words or characters, causing word-level safety classifiers to miss the attack entirely. It works against most commercial safety filters. Here is how it works and how G8KEPR detects it. Security https://g8kepr.com/blog/hipaa-technical-safeguards-2026 https://g8kepr.com/blog/hipaa-technical-safeguards-2026 Sat, 28 Mar 2026 04:00:00 GMT The HIPAA Security Rule has not changed, but the threat landscape has. In 2026, ePHI travels through AI pipelines, webhook queues, and multi-tenant SaaS APIs that did not exist when the rule was written. Here is what §164.312 actually means for a modern stack. Compliance https://g8kepr.com/blog/openai-codex-cli-rce-cve-2025-61260 https://g8kepr.com/blog/openai-codex-cli-rce-cve-2025-61260 Sat, 28 Mar 2026 04:00:00 GMT A critical RCE vulnerability in the OpenAI Codex CLI allowed malicious repository contents to execute arbitrary commands on the developer's machine. We break down the exploit chain, the patch, and what it means for AI coding tool security. Security https://g8kepr.com/blog/soc2-vs-iso27001 https://g8kepr.com/blog/soc2-vs-iso27001 Fri, 27 Mar 2026 04:00:00 GMT Both demonstrate that you take security seriously. SOC 2 is the US enterprise standard; ISO 27001 is the global enterprise standard. The right choice depends on your customer geography, your team size, and whether you're optimising for sales cycles or supply chain questionnaires. Compliance https://g8kepr.com/blog/prompt-injection-attacks https://g8kepr.com/blog/prompt-injection-attacks Wed, 25 Mar 2026 04:00:00 GMT Prompt injection is not a web vulnerability. It is a semantic attack that exploits the fact that LLMs cannot reliably distinguish between instructions and data. A WAF rule will not help. Here is what actually does. Security https://g8kepr.com/blog/api-versioning-strategy https://g8kepr.com/blog/api-versioning-strategy Mon, 23 Mar 2026 04:00:00 GMT Breaking changes are unavoidable. How you handle them determines whether your API is a competitive advantage or a customer attrition driver. URL versioning, header versioning, query parameter versioning — here is when each is right and what a good sunset process looks like. Architecture https://g8kepr.com/blog/zero-width-character-injection https://g8kepr.com/blog/zero-width-character-injection Sun, 22 Mar 2026 04:00:00 GMT Zero-width characters (U+200B through U+200F) are invisible in most text editors and browsers but fully visible to LLMs. Attackers use them to embed hidden instructions, evade pattern matching, and break token-level safety classifiers. Here is how the attack works and why it is hard to detect. Security https://g8kepr.com/blog/eu-ai-act-august-2026-engineering-checklist https://g8kepr.com/blog/eu-ai-act-august-2026-engineering-checklist Sun, 22 Mar 2026 04:00:00 GMT The EU AI Act's August 2026 compliance deadline for high-risk AI systems is three months away. This is the engineering checklist — not the legal summary — covering logging, documentation, human oversight, and accuracy testing requirements. Compliance https://g8kepr.com/blog/api-security-vs-ai-gateway https://g8kepr.com/blog/api-security-vs-ai-gateway Fri, 20 Mar 2026 04:00:00 GMT An API gateway handles routing, rate limiting, and authentication. An AI gateway handles LLM cost routing, prompt injection, output validation, and token budget enforcement. These are not the same problem — and conflating them is how AI security debt accumulates. Architecture https://g8kepr.com/blog/api-key-security https://g8kepr.com/blog/api-key-security Wed, 18 Mar 2026 04:00:00 GMT API key leakage is the most common initial access vector in API breaches. Keys end up in GitHub commits, in build logs, in client-side JavaScript, and in Slack messages. The problem is not developer carelessness — it is missing controls. Here is the complete playbook. Security https://g8kepr.com/blog/idempotency-keys https://g8kepr.com/blog/idempotency-keys Tue, 17 Mar 2026 04:00:00 GMT A network timeout on a payment API leaves you in an unknown state: did the charge succeed or not? Idempotency keys solve this by making any number of retries produce exactly the same result as a single request. Here is how to implement them correctly. Architecture https://g8kepr.com/blog/zero-trust-ai-agents https://g8kepr.com/blog/zero-trust-ai-agents Sun, 15 Mar 2026 04:00:00 GMT Zero trust means "never trust, always verify" — for users and services. AI agents present a new challenge: they are principals that can change their effective permissions based on prompt injection. Traditional access control cannot handle this. Here is the architecture that can. Architecture https://g8kepr.com/blog/breach-notification-2026 https://g8kepr.com/blog/breach-notification-2026 Sun, 15 Mar 2026 04:00:00 GMT A data breach triggers notification obligations across multiple frameworks simultaneously. GDPR gives you 72 hours. HIPAA gives you 60 days. State laws give you anywhere from 30 to 90 days. Here is how to navigate overlapping obligations without missing a deadline. Compliance https://g8kepr.com/blog/memory-poisoning-ai-agents https://g8kepr.com/blog/memory-poisoning-ai-agents Sun, 15 Mar 2026 04:00:00 GMT AI agents with persistent memory can be compromised through a single malicious interaction that embeds false beliefs into long-term storage. Those beliefs persist across sessions, across resets, and across users — creating a durable foothold that outlasts typical incident response. Security https://g8kepr.com/blog/shadow-api-discovery https://g8kepr.com/blog/shadow-api-discovery Thu, 12 Mar 2026 04:00:00 GMT Shadow APIs are endpoints that exist in production but are not in your OpenAPI spec, not covered by your security controls, and not monitored. Every mature codebase has them. Here's how to find them before attackers do. Security https://g8kepr.com/blog/what-is-mcp https://g8kepr.com/blog/what-is-mcp Tue, 10 Mar 2026 04:00:00 GMT MCP is Anthropic's open standard for connecting AI models to external tools. It is rapidly becoming the default integration pattern for AI agents — and most teams deploying it have no visibility into what their models are actually calling. Security https://g8kepr.com/blog/openapi-security-design https://g8kepr.com/blog/openapi-security-design Tue, 10 Mar 2026 04:00:00 GMT An OpenAPI spec is not just documentation — it is a machine-readable security boundary. Every field defined in the spec is a validated field; every field not defined is rejected. Here is how to use OpenAPI 3.1 to enforce security properties at design time. Architecture https://g8kepr.com/blog/what-mythos-means-api-security https://g8kepr.com/blog/what-mythos-means-api-security Tue, 10 Mar 2026 04:00:00 GMT Mythos has shifted the conversation about AI security from theoretical risks to demonstrated exploits with CVSS scores. For API security teams, this means the threat model has changed. Here is what to prioritize and what to stop worrying about. Security https://g8kepr.com/blog/gdpr-art22-explainability https://g8kepr.com/blog/gdpr-art22-explainability Thu, 05 Mar 2026 05:00:00 GMT Article 22 requires that individuals subject to automated decisions receive "meaningful information about the logic involved." For LLM-based systems this is genuinely hard — but it is implementable. Here is the approach that satisfies regulators. Compliance https://g8kepr.com/blog/http3-api-security https://g8kepr.com/blog/http3-api-security Thu, 05 Mar 2026 05:00:00 GMT HTTP/3 replaces TCP with QUIC — a UDP-based protocol with built-in TLS 1.3. The security implications are mostly positive, but the change also introduces new considerations for rate limiting, traffic inspection, and DDoS mitigation. Here is what security teams need to know. Architecture https://g8kepr.com/blog/multi-agent-cascading-failures https://g8kepr.com/blog/multi-agent-cascading-failures Thu, 05 Mar 2026 05:00:00 GMT When one agent in a multi-agent pipeline fails or is compromised, the failure can propagate through the entire system in seconds. We examine three real-world cascading failure patterns and the architectural controls that contain them. Architecture https://g8kepr.com/blog/rate-limiting-ai-apis https://g8kepr.com/blog/rate-limiting-ai-apis Sat, 28 Feb 2026 05:00:00 GMT Traditional API rate limiting counts requests. AI APIs need to count tokens. A single malicious request that consumes 100K tokens in one call is not caught by a "100 requests per minute" rule. Here is how to rate limit AI endpoints correctly. Architecture https://g8kepr.com/blog/policy-puppetry-attacks https://g8kepr.com/blog/policy-puppetry-attacks Sat, 28 Feb 2026 05:00:00 GMT Policy puppetry wraps malicious instructions in XML, JSON, or INI config-style wrappers that exploit patterns in LLM pre-training data. The attack makes instructions look like configuration rather than user input — and many models follow configuration more readily than user messages. Security https://g8kepr.com/blog/vendor-risk-llm-providers https://g8kepr.com/blog/vendor-risk-llm-providers Wed, 25 Feb 2026 05:00:00 GMT Your LLM provider processes your customer data, your system prompts, and your training signals. Their security posture is your security posture. Most vendor security questionnaires were not written with AI providers in mind. Here is what to ask instead. Compliance https://g8kepr.com/blog/eu-ai-act-logging-requirements https://g8kepr.com/blog/eu-ai-act-logging-requirements Wed, 25 Feb 2026 05:00:00 GMT Article 12 of the EU AI Act mandates automatic logging of AI system operations. This is not a check-the-box compliance exercise — it requires substantive engineering. Here is exactly what the regulation requires and what to build. Compliance