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Fencer Intel
medium —

GHSA-h97f-6pqj-q452 json

OpenClaw has a IPv6 multicast SSRF classifier bypass

published 8mo ago modified 8mo ago

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

### 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: `<= 2026.2.24` - Patched 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.

Patch / fix

  • npm openclaw 2026.2.25

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Affected packages

ecosystem package affected fixed in
npm openclaw
<2026.2.25
2026.2.25

Classification

Weakness
  • CWE-918 Server-Side Request Forgery

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of openclaw/openclaw published their own advisory on GitHub. Reviewed sources take precedence over it.