Vulnerability in crawl4ai (CVE-2026-56265)
Summary
Vulnerability in crawl4ai (CVE-2026-56265). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 0.8.7 or later.
Original description
The description as published by the source.
Crawl4AI before 0.8.7 contains an authentication bypass vulnerability due to a hardcoded default JWT signing key in the Docker API server. Attackers who know the default key can forge valid authentication tokens for any user, bypassing authentication and gaining full access to protected functionality.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-56265 has been found in crawl4ai.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: upgrade crawl4ai to 0.8.7 or later.
If unsure, ask your IT team or search "crawl4ai CVE-2026-56265" on the vendor's site.
CVE-2026-56265 (crawl4ai) — CWE-798 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 0.8.7 — 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.
A vulnerability (CWE-798) exists in crawl4ai.
Check the vendor advisory for the affected versions of crawl4ai.
Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover.
Update to 0.8.7.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'crawl4ai' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'crawl4ai' . | 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
crawl4aiを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade crawl4ai to 0.8.7ステージング環境で 0.8.7 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を含めること。
-
3Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- web disclosure@vulncheck.com
- web github.com
- web vulncheck.com
- web nvd.nist.gov
- web github.com
- web github.com