PT-2026-35799 · Openclaw · Openclaw

Keensecuritylab · Published 2026-04-09 · Updated 2026-04-29 · CVE-2026-42420

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions OpenClaw versions prior to 2026.4.8

Description Improper input validation exists in base64 decode paths that allocate memory before enforcing decoded-size limits. This allows attackers to use crafted base64-encoded input to cause memory exhaustion or a denial of service (a condition where a system becomes unavailable to its intended users).

Recommendations Update to version 2026.4.8.

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-42420

GHSA-CCX3-FW7Q-RR2R

Affected Products

Openclaw

References · 8

• https://github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5 · Patch
• https://github.com/openclaw/openclaw/security/advisories/GHSA-ccx3-fw7q-rr2r · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-ccx3-fw7q-rr2r · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42420 · Security Note
• https://github.com/openclaw/openclaw · Note
• https://twitter.com/VulmonFeeds/status/2049291220027871421 · Twitter Post
• https://twitter.com/CVEnew/status/2049227503798047147 · Twitter Post
• https://vulncheck.com/advisories/openclaw-improper-base64-decoding-size-validation · Note