GHSA-h97f-6pqj-q452 OpenClaw has a IPv6 multicast SSRF classifier bypass

• npm openclaw: < 2026.2.25 → fixed in 2026.2.25

Summary OpenClaw's SSRF IP classifier did not treat IPv6 multicast literals (`ff00::/8`) as blocked/private-internal. This allowed literal multicast hosts to pass SSRF preflight checks. Impact A bypass in address classification existed for IPv6 multicast literals. OpenClaw's network fetch/navigation paths are constrained to HTTP/HTTPS and this was triaged as low-severity defense-in-depth hardening. Affected Packages / Versions • Package: `openclaw` (npm) • Affected versions: `= 2026.2.25` Technical Details The IPv6 private/internal range set omitted `multicast`, so addresses like `ff02::1` and `ff05::1:3` were not classified as blocked by the shared SSRF classifier. Fix Commit(s) • `baf656bc6fd7f83b6033e6dbc2548ec75028641f` Release Process Note `patched_versions` is pre-set to the planned next npm release (`2026.2.25`). Once that release is published on npm, the advisory is published. OpenClaw thanks @zpbrent for reporting.