CVE-2025-6921

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2025-6921
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-6921.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-6921
Aliases
Related
Published
2025-09-23T14:15:41.387Z
Modified
2026-03-13T03:49:57.977441Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

The huggingface/transformers library, versions prior to 4.53.0, is vulnerable to Regular Expression Denial of Service (ReDoS) in the AdamWeightDecay optimizer. The vulnerability arises from the douseweightdecay method, which processes user-controlled regular expressions in the includeinweightdecay and excludefromweightdecay lists. Malicious regular expressions can cause catastrophic backtracking during the re.search call, leading to 100% CPU utilization and a denial of service. This issue can be exploited by attackers who can control the patterns in these lists, potentially causing the machine learning task to hang and rendering services unresponsive.

References

Affected packages

Git / github.com/huggingface/transformers

Affected ranges

Type
GIT
Repo
https://github.com/huggingface/transformers
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
67ddc82fbc7e52c6f42a395b4a6d278c55b77a39
Fixed
47c34fba5c303576560cb29767efb452ff12b8be
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.53.0"
        }
    ]
}

Affected versions

0.*
0.1.2
0.5.0
1.*
1.0
1.1.0
1.2.0
3.*
3.0.1
4.*
4.3.0.rc1
v0.*
v0.1.2
v0.2.0
v0.3.0
v0.4.0
v0.5.0
v0.5.1
v0.6.0
v0.6.1
v0.6.2
v1.*
v1.0.0
v2.*
v2.0.0
v2.1.0
v2.1.1
v2.10.0
v2.11.0
v2.2.0
v2.2.1
v2.2.2
v2.3.0
v2.4.0
v2.4.1
v2.5.0
v2.5.1
v2.6.0
v2.7.0
v2.8.0
v2.9.0
v2.9.1
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.1.0
v3.2.0
v3.3.0
v3.3.1
v3.4.0
v3.5.0
v4.*
v4.0.0-rc-1
v4.1.0
v4.1.1
v4.10.0
v4.11.0
v4.12.0
v4.13.0
v4.14.0
v4.15.0
v4.16.0
v4.2.0
v4.3.0.rc1
v4.33.1
v4.4.0
v4.49.0-AyaVision
v4.49.0-Mistral-3
v4.49.0-SigLIP-2
v4.49.0-SmolVLM-2
v4.5.0
v4.50.3-DeepSeek-3
v4.51.3-BitNet-preview
v4.51.3-CSM-preview
v4.51.3-D-FINE-preview
v4.51.3-GraniteMoeHybrid-preview
v4.51.3-InternVL-preview
v4.51.3-Janus-preview
v4.51.3-LlamaGuard-preview
v4.51.3-MLCD-preview
v4.51.3-Qwen2.5-Omni-preview
v4.51.3-SAM-HQ-preview
v4.51.3-TimesFM-preview
v4.52.4-ColQwen2-preview
v4.52.4-Kyutai-STT-preview
v4.52.4-VJEPA-2-preview
v4.6.0
v4.7.0
v4.8.0
v4.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-6921.json"