GHSA-r9q5-c7qc-p26w OpenClaw's Nextcloud Talk webhook replay could trigger duplicate inbound processing

• npm openclaw: < 2026.2.25 → fixed in 2026.2.25

Summary When Nextcloud Talk webhook signing was valid, replayed requests could be accepted without durable replay suppression, allowing duplicate inbound processing after replay-window expiry or process restart. Details OpenClaw's Nextcloud Talk webhook path verified `HMAC(secret, random + body)` but previously lacked durable replay state tied to webhook events. This allowed replay of a previously valid signed request in some operational conditions. The fix on `main` adds: • persistent per-account replay dedupe for Nextcloud Talk webhook events, • replay checks before webhook side effects (`onMessage`), • backend-origin validation against configured account base URL (when configured). Impact A captured valid signed webhook request could be replayed to trigger duplicate inbound handling. This is an integrity/availability issue (duplicate actions/noise), scoped to deployments using Nextcloud Talk webhook integration. Affected Packages / Versions • Package: `openclaw` (npm) • Affected: `<= 2026.2.24` • Patched in release: `2026.2.25` Fix Commit(s) • `d512163d686ad6741783e7119ddb3437f493dbbc` Release Process Note `patched_versions` is pre-set to the release (`2026.2.25`) so once npm release `2026.2.25` is published, advisory is now published. OpenClaw thanks @aristorechina for reporting.