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CVE-2026-44479
medium
CVSS 5.5
Information Disclosure in vercel (CVE-2026-44479)
Summary
vulnerability in vercel (CVE-2026-44479). Confidential information can be exposed externally. Exploitable via ``VERCEL_TOKEN``. Mitigation: upgrade to `52.0.1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-44479** has been found in vercel.
Attackers can target a specific entry point like ``VERCEL_TOKEN`` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 5.5/10.
What to do: upgrade vercel to **52.0.1** or later.
If unsure, ask your IT team or search "vercel CVE-2026-44479" on the vendor's site.
CVE-2026-44479 (vercel) — CWE-200 / CVSS v3 5.5
Attack vector: local / unauthenticated
Attack surface: `VERCEL_TOKEN`
Patched: `52.0.1` — apply immediately
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
**information disclosure** (CWE-200) exists in vercel. Attackers reach the vulnerable code path via ``VERCEL_TOKEN`` without authentication.
📍 Affected scope
vercel — . Attack surface: `VERCEL_TOKEN`.
🔥 Severity
Severity: Medium (CVSS 5.5/10). Confidential information can be exposed externally
🔧 How to fix
Update to **52.0.1**.
🛡️ 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 'vercel' .` 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
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1Identify exposure identify
grep -r 'vercel' . | 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 `vercel` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade vercel to 52.0.1ステージング環境で 52.0.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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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
npm
vercel
[{"type":"SEMVER","events":[{"introduced":"50.16.0"},{"fixed":"52.0.1"}]}]