CVE-2026-41407: OpenClaw < 2026.4.2 - Timing Side Channel in Shared-Secret Comparison

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-28 · updated 2026-06-17
Weakness: CWE-208

Description

OpenClaw before 2026.4.2 contains a timing side channel vulnerability in shared-secret comparison call sites that use early length-mismatch checks instead of fixed-length comparison helpers. Attackers can measure timing differences to leak secret-length information, weakening constant-time handling for shared secrets.

Affected products

OpenClaw: before 2026.4.2 — fixed in 2026.4.2

How to fix

Upgrade to a fixed version: OpenClaw 2026.4.2. Check the vendor advisory for mitigations.

References

https://github.com/openclaw/openclaw/commit/be10ecef770a4654519869c3641bbb91087c8c7b
https://github.com/openclaw/openclaw/security/advisories/GHSA-jj6q-rrrf-h66h
https://www.vulncheck.com/advisories/openclaw-timing-side-channel-in-shared-secret-comparison

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