CVE-2026-42420CWE-770

OpenClaw < 2026.4.8 - Improper Base64 Decoding Size Validation

Medium · published April 28, 2026

CVSS v4.0
5.3
EPSS
1%
Percentile
45.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00548 · 45.1th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-04-28T18:10Z
EPSS history
Timeline
  • 28 APR 18:10Z
    OpenClaw < 2026.4.8 - Improper Base64 Decoding Size Validation
    cvelistv5