{"action":"Upgrade transformers to 4.53.0 or later.","affected":[{"fixed":"4.53.0","introduced":"0"}],"component":"transformers","cve_ids":["CVE-2025-6638"],"ecosystem":"PyPI","epss":0.00555,"exploited":false,"fixed_versions":["4.53.0"],"ghsa_id":"GHSA-59p9-h35m-wg4g","id":"tcs_01M5KGWT3CDGKF5SA5EQZ500DV","modified_at":"2026-07-07T17:48:13.629855933Z","published_at":"2026-07-07T16:03:04.965561Z","references":["https://osv.dev/vulnerability/PYSEC-2026-1981","https://nvd.nist.gov/vuln/detail/CVE-2025-6638","https://github.com/huggingface/transformers/commit/47c34fba5c303576560cb29767efb452ff12b8be","https://github.com/huggingface/transformers/commit/d37f7517972f67e3f2194c000ed0f87f064e5099","https://github.com/huggingface/transformers","https://huntr.com/bounties/6a6c933f-9ce8-4ded-8b3b-2c1444c61f36","https://pypi.org/project/transformers","https://github.com/advisories/GHSA-59p9-h35m-wg4g"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"PYSEC-2026-1981","url":"https://osv.dev/vulnerability/PYSEC-2026-1981"}],"summary":"Hugging Face Transformers is vulnerable to ReDoS through its MarianTokenizer"}