CVE-2026-125321 (GCVE-0-2026-125321)

Vulnerability from cvelistv5 – Published: 2026-11-10 17:36 – Updated: 2026-11-10 21:07
VLAI
Title
pgEdge Postgres MCP Server login rate limiting can be evaded by a caller-supplied header
Summary
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-10 21:07 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
  • CWE-807 - Reliance on Untrusted Inputs in a Security Decision
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7861 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
pgEdge pgedge-postgres-mcp Affected: < 1.1.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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