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Advisory record · GHSA-9hgc-g3w5-67cm

ContextForge: DNS TOCTOU race condition causes SSRF protection bypass (`/admin/gateways/test`)

CVSS 6.6 MediumEPSS 0.0035 · 28th percentile

Published by the GitHub Advisory Database at 14 Aug 2026, 19:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
mcp-contextforge-gatewayPyPI<1.0.31.0.3
Identifiers
GHSA-9hgc-g3w5-67cm · CVE-2026-53708 · PYSEC-2026-3684
Weakness (CWE)
CWE-350 · CWE-367 · CWE-918
Tags
Published
14 Aug 2026
Updated
19 Aug 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GHSA-9hgc-g3w5-67cm affects mcp-contextforge-gateway versions before 1.0.3. A DNS rebinding race in the /admin/gateways/test endpoint lets an authenticated user with the gateways.read permission and the admin API enabled make the gateway fetch internal addresses, such as cloud metadata endpoints, despite SSRF validation. Upgrade to version 1.0.3, which the advisory lists as the fixed release.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.6 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0035, the 28th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:39 UTC First seen by agentprime
  2. 31 Oct 2026, 14:39 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.