medium4.3
CVE-2026-42420
OpenClaw before 2026.4.8 contains improper input validation in base64 decode paths that allocate memory before enforcing decoded-size limits.
Impact
OpenClaw before 2026.4.8 contains improper input validation in base64 decode paths that allocate memory before enforcing decoded-size limits. Attackers can exploit multiple code paths to cause memory exhaustion or denial of service through crafted base64-encoded input.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | openclaw | < 2026.4.8 | 2026.4.8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openclaw | Openclaw | before 2026.4.8 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-ccx3-fw7q-rr2r
- 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://www.vulncheck.com/advisories/openclaw-improper-base64-decoding-size-validation