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Security2026-09-20 · source-backed
Published September 19 at CVSS 3.3, OpenPanel through commit bad75bdd logs MCP authentication tokens taken from query parameters without redaction (NVD). Anyone reading application stdout or a centralized log pipeline can lift the base64 credentials and replay them. Low score, real lesson: a token in a query parameter lands in every proxy access log, log shipper and crash report downstream of you.
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CVE-2026-82021 (CVSS 9.0) covers Hermes Agent 0.18.2 through 0.19.0, where the bundled MCP catalog referenced a third-party upstream by branch name rather than commit SHA. Compromise the upstream and your code reaches every host installing that catalog entry, with zero operato...
The Model Context Protocol has a security problem that's no longer theoretical — it's statistical. Between January and February 2026, researchers filed 30+ CVEs against MCP servers, clients, and infrastructure. One package with nearly 500,000 downloads carried a CVSS 9.6 RCE....
CVE-2026-90474, published September 12 at CVSS 7.6, is an authentication bypass in MCPHub's embedded OAuth 2.0 authorization server: client authentication is off by default and PKCE enforcement is optional (NVD). Two days after the Langflow and ContextForge cluster, the same s...
Your read-only flag is a claim, not a guarantee. Two independent Postgres MCP servers proved it on September 4. Postgres MCP Pro got CVE-2026-85620 at CVSS 9.2. The bug is one line of reasoning in safe_sql.py: the validator checks function names on FuncCall AST nodes. A functi...
The trick is one line in a file you never read. Manifold Security published eight findings across seven coding agents (Claude Code, Codex, Cursor, Grok Build, Qwen Code, goose, Hermes Agent) that all reduce to the same mechanism. A repository's own .git/config sets core.fsmoni...
Token Security researcher Ariel Simon will present at RSAC 2026 a vulnerability chain starting from SSRF in Microsoft's Azure MCP server (CVE-2026-26118, CVSS 8.8). The managed identity token included in outbound MCP requests is capturable without admin access, then escalatabl...
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