GHSA-ccx3-fw7q-rr2r
OpenClaw: Multiple Code Paths Missing Base64 Pre-Allocation Size Checks
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
## Impact
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.
## Affected Packages / Versions
- Package: `openclaw` (npm)
- Affected versions: `<=v2026.4.2`
- Patched versions: `2026.4.8`
## Fix
The issue was fixed on `main` and is available in the patched npm version listed above. The verified fixed tree is commit `d7c3210cd6f5fdfdc1beff4c9541673e814354d5`.
## Verification
The fix was re-checked against `main` before publication, including targeted regression tests for the affected security boundary.
## Credits
Thanks @zsxsoft and @KeenSecurityLab for reporting.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/openclaw/openclaw/security/advisories/GHSA-ccx3-fw7q-rr2r
- https://nvd.nist.gov/vuln/detail/CVE-2026-42420
- https://github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5
- https://github.com/openclaw/openclaw
- https://www.vulncheck.com/advisories/openclaw-improper-base64-decoding-size-validation