High · CVSS 8.3CVE-2026-118687

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 AuthenticationCVE-2026-118687

Answer in brief

CVE-2026-118687 records a High severity (CVSS 8.3) vulnerability in 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. The current sources do not mark it as known exploited. The current feed maps coder/coder (generic), coder/coder (generic), coder/coder (generic), coder/coder (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 28, 2026Updated Oct 28, 2026Source checked Oct 28, 2026First seen by HOL Oct 28, 2026Material review Oct 28, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.3
Exploitation: Not marked as known exploited
Affected software: 5 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps coder/coder (generic), coder/coder (generic), coder/coder (generic), coder/coder (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
coder/codergeneric	>=2.37.0 <2.37.4	2.37.4
coder/codergeneric	>=2.36.0 <2.36.7	2.36.7
coder/codergeneric	>=2.35.0 <2.35.9	2.35.9
coder/codergeneric	>=2.30.0 <2.34.12	2.34.12
coder/codergeneric	>=0 <2.29.21	2.29.21

Recommended response

Check inventory. Check lockfiles and deployed manifests for coder/coder, coder/coder, coder/coder.
Review the reported fix. Update coder/coder to 2.37.4; coder/coder to 2.36.7; coder/coder to 2.35.9; coder/coder to 2.34.12; coder/coder to 2.29.21 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 28, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.