CVE-2025-6921
unknown
CVSS v3
—
CVSS v4 NEW
—
VIR risk
—
Description
Hugging Face Transformers vulnerable to Regular Expression Denial of Service (ReDoS) in the AdamWeightDecay optimizer
Predictions
Exploit likelihood
30%
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 |
|---|---|---|---|
| PyPI | transformers | <4.53.0 | 4.53.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-6921
- https://github.com/huggingface/transformers/commit/47c34fba5c303576560cb29767efb452ff12b8be
- https://github.com/huggingface/transformers/commit/d37f7517972f67e3f2194c000ed0f87f064e5099
- https://github.com/huggingface/transformers
- https://huntr.com/bounties/287d15a7-6e7c-45d2-8c05-11e305776f1f
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.