pgEdge Postgres MCP Server login rate limiting can be evaded by a caller-supplied header
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| pgEdge | pgedge-postgres-mcp | affected |
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No data available yet.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.469% probability within 30 days)
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ssvc
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| Description | pgEdge Postgres MCP Server enables SQL queries against PostgreSQL databases through Model Context Protocol compatible clients. Prior to 1.1.0, deployments exposing the nondefault HTTP transport with authentication enabled used the leftmost caller-supplied X-Forwarded-For value as the client address for login rate limiting. ExtractIPAddress in internal/auth/middleware.go supplied that value to IsAllowed and RecordFailedAttempt in internal/auth/rate_limiter.go, allowing an unauthenticated caller to rotate addresses to evade throttling or assert another user's address to consume that user's limiter bucket. The published nginx configuration appended rather than replaced X-Forwarded-For, making the issue reachable without an operator misconfiguration. Username-keyed account lockout did not use the client address, but shipped defaults disabled that separate control through MaxFailedAttemptsBeforeLockout: 0. This issue is fixed in version 1.1.0. | |
| Title | pgEdge Postgres MCP Server login rate limiting can be evaded by a caller-supplied header | |
| Weaknesses | CWE-770 CWE-807 |
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cvssV3_1
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