CVE-2026-42420

MEDIUM

4.3

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.

CVE Details

CVSS v3.1 Score4.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published4/28/2026

Last Modified4/30/2026

Sourcenvd

Honeypot Sightings0

Affected Products

openclaw:openclaw

Weaknesses (CWE)

CWE-770

References

https://github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5(disclosure@vulncheck.com)

https://github.com/openclaw/openclaw/security/advisories/GHSA-ccx3-fw7q-rr2r(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/openclaw-improper-base64-decoding-size-validation(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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