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

• npm openclaw: < 2026.4.2 → fixed in 2026.4.2

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: `= 2026.4.2` • 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.