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CVE-2026-9540
medium
CVSS 5.3
Vulnerability in vllm (CVE-2026-9540)
Summary
vulnerability in vllm (CVE-2026-9540). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-9540** has been found in vllm.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "vllm CVE-2026-9540" on the vendor's site.
CVE-2026-9540 (vllm) — CWE-404 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (CWE-404) exists in vllm.
📍 Affected scope
vllm — .
🔥 Severity
Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'vllm' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'vllm' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `vllm` を grep し、稼働しているサービス・バージョンを把握する。
-
7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
pip
vllm
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- web [email protected]
- web https://github.com/vllm-project/vllm/issues/37343
- web https://github.com/vllm-project/vllm/pull/37594
- web [email protected]
- web https://vuldb.com/submit/814645
- web https://vuldb.com/vuln/365601
- web https://vuldb.com/vuln/365601/cti
- web https://nvd.nist.gov/vuln/detail/CVE-2026-9540
- web https://github.com/vllm-project/vllm
- web https://ingero.io/debugging-vllm-latency-minimax-ollama-mcp
- web https://github.com/advisories/GHSA-98f3-hwg4-4rf7