CVE-2026-118687

8.3 high

Coder before 2.29.21, 2.30.0 before 2.34.12, 2.35.0 before 2.35.9, 2.36.0 before 2.36.7, and 2.37.0 before 2.37.4 does not validate the audience claim of GCE instance-identity JWTs at the POST /api/v2/workspaceagents/google-instance-identity endpoint. Attackers who obtain an unexpired format=full identity token minted for another relying party can replay it to obtain that workspace agent's session token, which remains valid until the workspace's next build.

CVSS 4.0: 8.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
CWE: CWE-441
Published: 2026-10-28
Modified: 2026-10-28
Record from: the NVD, synced 2026-10-28

References

https://github.com/coder/coder/security/advisories/GHSA-24vh-q7rg-243w
https://www.vulncheck.com/advisories/coder-before-2.29.21-2.34.12-2.35.9-2.36.7-and-2.37.4-missing-audience-validation-in-gcp-instance-identity-authentication

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