OpenClaw has a IPv6 multicast SSRF classifier bypass
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub.
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | openclaw (npm) | before 2026.2.25 | 2026.2.25 | Patch available | GHSA-h97f-6pqj-q452 |
- openclaw (npm) Vendor— Affected before 2026.2.25 Fixed in 2026.2.25 Patch available GHSA-h97f-6pqj-q452
Remediation
- Fix · GHSA-h97f-6pqj-q452 openclaw (npm) Fixed in 2026.2.25 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-h97f-6pqj-q452
References
Sources
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