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BREW-openclaw-cli-CVE-2026-41407 — OpenClaw: Shared-secret comparison call sites leaked length information through timing

2026-10-03T13:26:40.467821+00:00

Affected: Homebrew: openclaw-cli

## Summary

Before OpenClaw 2026.4.2, several shared-secret comparison call sites still used early length-mismatch checks instead of the shared fixed-length comparison helper. Those paths could leak secret-length information through measurable timing differences.

## Impact

The affected paths exposed a low-severity timing side channel on secret comparison. The issue did not by itself demonstrate auth bypass, but it weakened the intended constant-time handling for shared secrets.

## Affected Packages / Versions

- Package: `openclaw` (npm) - Affected versions: `<= 2026.4.1` - Patched versions: `>= 2026.4.2` - Latest published npm version: `2026.4.1`

## Fix Commit(s)

- `be10ecef770a4654519869c3641bbb91087c8c7b` — reuse the shared secret comparison helper at affected call sites

## Release Process Note

The fix is present on `main` and is staged for OpenClaw `2026.4.2`. Publish this advisory after the `2026.4.2` npm release is live.

Thanks @kexinoh of Tencent zhuque Lab (https://github.com/Tencent/AI-Infra-Guard) for reporting.

EUVD-2026-308047

2026-10-03T13:26:40.467932+00:00

EUVD-2026-308047

fkie_cve-2026-41407

2026-10-03T13:26:40.467956+00:00

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.

GHSA-jj6q-rrrf-h66h — OpenClaw: Shared-secret comparison call sites leaked length information through timing

2026-10-03T13:26:40.467994+00:00

Affected: npm: openclaw