CVE-2026-42420
Medium
Description
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.
SeverityMedium
CVSS4.3
Exploit probability—
ProductOpenclaw
PublishedApr 28, 2026
First seenApr 28, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- openclaw openclaw2026.4.8 or later
- openclaw2026.4.8 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openclaw openclaw | v < 2026.4.8 | 2026.4.8 |
| openclawnpm | v < 2026.4.8 | 2026.4.8 |
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