CVE-2026-28478: OpenClaw affected by denial of service via unbounded webhook request body buffering

February 18, 2026 (updated March 5, 2026)

Multiple webhook handlers accepted and buffered request bodies without a strict unified byte/time limit. A remote unauthenticated attacker could send oversized payloads and cause memory pressure, degrading availability.

References

github.com/advisories/GHSA-q447-rj3r-2cgh
github.com/openclaw/openclaw
github.com/openclaw/openclaw/security/advisories/GHSA-q447-rj3r-2cgh
nvd.nist.gov/vuln/detail/CVE-2026-28478

Code Behaviors & Features

Detect and mitigate CVE-2026-28478 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →