CVE-2026-42420: OpenClaw: Multiple Code Paths Missing Base64 Pre-Allocation Size Checks
(updated )
Multiple Code Paths Missing Base64 Pre-Allocation Size Checks.
Several base64 decode paths could allocate before enforcing decoded-size limits.
OpenClaw is a user-controlled local assistant. This advisory is scoped to the OpenClaw trust model and does not assume a multi-tenant service boundary.
References
- github.com/advisories/GHSA-ccx3-fw7q-rr2r
- github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5
- github.com/openclaw/openclaw/security/advisories/GHSA-ccx3-fw7q-rr2r
- nvd.nist.gov/vuln/detail/CVE-2026-42420
- www.vulncheck.com/advisories/openclaw-improper-base64-decoding-size-validation
Code Behaviors & Features
Detect and mitigate CVE-2026-42420 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 →