PT-2026-33671 · Npm · Openclaw

Published 2026-04-09 · Updated 2026-04-09

OSV

CVSS v3.1

4.3

Medium

Base vector

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

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.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

GHSA-CCX3-FW7Q-RR2R

Affected Products

Openclaw

References · 6

• 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/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5 · Note
• https://github.com/openclaw/openclaw · Note
• https://github.com/openclaw/openclaw/security/advisories/GHSA-ccx3-fw7q-rr2r · Note
• https://vulncheck.com/advisories/openclaw-improper-base64-decoding-size-validation · Note