Open Redirect in OpenClaw (CVE-2026-40037)
Summary
Vulnerability in OpenClaw (CVE-2026-40037). Confidential information can be exposed externally. Mitigation: upgrade to 2026.4.8 or later.
Original description
The description as published by the source.
OpenClaw before 2026.3.31 (patched in 2026.4.8) contains a request body replay vulnerability in fetchWithSsrFGuard that allows unsafe request bodies to be resent across cross-origin redirects. Attackers can exploit this by triggering redirects to exfiltrate sensitive request data or headers to unintended origins.
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-2026-40037 has been found in OpenClaw.
Confidential information can be exposed externally. CVSS score: 6.5/10.
What to do: upgrade OpenClaw to 2026.4.8 or later.
If unsure, ask your IT team or search "OpenClaw CVE-2026-40037" on the vendor's site.
CVE-2026-40037 (OpenClaw) — CWE-601 / CVSS v3 6.5
Attack vector: remote (network-reachable) / unauthenticated
Patched: 2026.4.8 — 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-601) exists in OpenClaw.
Check the vendor advisory for the affected versions of OpenClaw.
Severity: Medium (CVSS 6.5/10). Confidential information can be exposed externally.
Update to 2026.4.8.
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 'OpenClaw' . 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 'OpenClaw' . | 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
OpenClaw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 OpenClaw to 2026.4.8ステージング環境で 2026.4.8 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。
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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。
References
- advisory github.com
- advisory vulncheck.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com