CVE Explorer

CVE-2025-6638

A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically affecting the MarianTokenizer's `remove_language_code()` method. This vulnerability is present in version 4.52.4 and has been fixed in version 4.53.0. The issue arises from inefficient regex processing, which can be exploited by crafted input strings containing malformed language code patterns, leading to excessive CPU consumption and potential denial of service.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9cd82be9e728c8737ddb9ea3c2291ff49696a1797c1bb34b541986941291f44b

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"huggingface/transformers","vendor":"huggingface","versions":[{"lessThan":"4.53.0","status":"affected","version":"unspecified","versionType":"custom"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:6ee368c6e11e8e34c86e9303acfb828b182baa9a165effb6ffcf769fe7da84c6 · sha256:1880e7e1b12fe96d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.0"},"metric_type":"cvssV3_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:6ee368c6e11e8e34c86e9303acfb828b182baa9a165effb6ffcf769fe7da84c6 · sha256:1880e7e1b12fe96d… · /containers/cna/metrics/0/cvssV3_0

CWE assertions

1 source assertion

{"cweId":"CWE-1333","description":"CWE-1333 Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:6ee368c6e11e8e34c86e9303acfb828b182baa9a165effb6ffcf769fe7da84c6 · sha256:1880e7e1b12fe96d… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"url":"https://github.com/huggingface/transformers/commit/47c34fba5c303576560cb29767efb452ff12b8be"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:6ee368c6e11e8e34c86e9303acfb828b182baa9a165effb6ffcf769fe7da84c6 · sha256:1880e7e1b12fe96d… · /containers/cna/references/1

{"url":"https://huntr.com/bounties/6a6c933f-9ce8-4ded-8b3b-2c1444c61f36"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:6ee368c6e11e8e34c86e9303acfb828b182baa9a165effb6ffcf769fe7da84c6 · sha256:1880e7e1b12fe96d… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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