CVE-2026-121967
Coder before 2.29.22, 2.34.13, 2.35.10, 2.36.8, 2.37.5, and 2.38.1 AI Gateway Path Traversal
Coder 2.28.0 before 2.29.22, 2.30.0 before 2.34.13, 2.35.0 before 2.35.10, 2.36.0 before 2.36.8, 2.37.0 before 2.37.5, and 2.38.0 before 2.38.1 contains a path traversal vulnerability in the AI Gateway passthrough router, which forwards percent-encoded dot segments upstream without rejecting them. Authenticated users can send paths such as %2e%2e or ..%2F under allowlisted prefixes to reach unintended provider endpoints using the deployment's centrally managed provider key.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| coder coder github.com/coder/coder/v2
golang |
≥ 2.37.0; < 2.37.5 (affected, semver) 2.37.5 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| coder coder github.com/coder/coder/v2
golang |
≥ 2.36.0; < 2.36.8 (affected, semver) 2.36.8 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| coder coder github.com/coder/coder/v2
golang |
≥ 2.35.0; < 2.35.10 (affected, semver) 2.35.10 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| coder coder github.com/coder/coder/v2
golang |
≥ 2.30.0; < 2.34.13 (affected, semver) 2.34.13 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| coder coder github.com/coder/coder/v2
golang |
≥ 2.28.0; < 2.29.22 (affected, semver) 2.29.22 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| coder coder github.com/coder/coder/v2
golang |
≥ 2.38.0; < 2.38.1 (affected, semver) 2.38.1 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 2.3 low |
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N | CNA: VulnCheck |
| 3.1 / 4.9 medium |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/coder/coder/security/advisories/GHSA-373r-678h-hjc6CNA: VulnCheck · vendor-advisory
- https://github.com/coder/coder/pull/30178CNA: VulnCheck · patch, issue-tracking
- https://www.vulncheck.com/advisories/coder-before-2.29.22-2.34.13-2.35.10-2.36.8-2.37.5-and-2.38.1-ai-gateway-path-traversalCNA: VulnCheck · third-party-advisory
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