CVE-2026-118687

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductCoder

PublishedOct 28, 2026

First seenNov 4, 2026

Weakness typeCWE-441CWE-441

How to fix

Update

coder coder2.37.4, 2.36.7, 2.35.9, 2.34.12, 2.29.21 or later

Vendor advisories

github.com/coder/coder/security/advisories/GHSA-24vh-q7rg-243w

Affected products

Product	Affected versions	Fixed in
coder coder	2.37.0 ≤ v < 2.37.4, 2.36.0 ≤ v < 2.36.7, 2.35.0 ≤ v < 2.35.9, 2.30.0 ≤ v < 2.34.12, v < 2.29.21	2.37.4, 2.36.7, 2.35.9, 2.34.12, 2.29.21

Check your version

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