CVE-2026-33693
medium
CVSS v3
6.5
CVSS v4 NEW
—
VIR risk
6.5
Description
Activitypub-Federation has SSRF via 0.0.0.0 bypass in activitypub-federation-rust v4_is_invalid()
Predictions
Exploit likelihood
75%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| crates.io | activitypub_federation | <0.7.0-beta.9 | 0.7.0-beta.9 |
References
- https://github.com/LemmyNet/activitypub-federation-rust/commit/4ae8532b17bc35755240b7f55d4a5b7665351599
- https://github.com/LemmyNet/lemmy/security/advisories/GHSA-q537-8fr5-cw35
- https://github.com/advisories/GHSA-7723-35v7-qcxw
- https://nvd.nist.gov/vuln/detail/CVE-2026-33693
- https://github.com/LemmyNet/activitypub-federation-rust
CWEs
CWE-918
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.