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CVE-2026-50157
Information Disclosure in auth0/symfony (CVE-2026-50157)
Summary
vulnerability in auth0/symfony (CVE-2026-50157). Risk of unauthorized operations or information disclosure. Exploitable via `Authorization header`. Mitigation: upgrade to `5.9.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-50157** has been found in auth0/symfony.
Attackers can target a specific entry point like `Authorization header` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade auth0/symfony to **5.9.0** or later.
If unsure, ask your IT team or search "auth0/symfony CVE-2026-50157" on the vendor's site.
CVE-2026-50157 (auth0/symfony) — CWE-200 /
Attack surface: Authorization header
Patched: `5.9.0` — 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 auth0/symfony. Attackers reach the vulnerable code path via `Authorization header` without authentication.
📍 Affected scope
auth0/symfony — . Attack surface: Authorization header.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **5.9.0**.
🛡️ 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 'auth0/symfony' .` 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 'auth0/symfony' . | 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 `auth0/symfony` 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 auth0/symfony to 5.9.0ステージング環境で 5.9.0 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
composer
auth0/symfony
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.9.0"}]}]
References
- web https://github.com/auth0/symfony/security/advisories/GHSA-ffq7-hh2j-r24p
- web https://github.com/auth0/symfony/commit/172d1d3e0b9d1e93610d786118389a811179bc8a
- web https://github.com/auth0/symfony/commit/bd1851b14ae15e99cbe87c96496cf25da025288a
- web https://github.com/auth0/symfony/releases/tag/5.9.0
- web https://github.com/advisories/GHSA-ffq7-hh2j-r24p