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Vulnerability details: VCID-msje-w8r1-wkh8
Vulnerability ID VCID-msje-w8r1-wkh8
Aliases CVE-2025-3262
GHSA-489j-g2vx-39wf
Summary Transformers vulnerable to ReDoS attack through its SETTING_RE variable A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular expression complexity in the `SETTING_RE` variable within the `transformers/commands/chat.py` file. The regex contains repetition groups and non-optimized quantifiers, leading to exponential backtracking when processing 'almost matching' payloads. This can degrade application performance and potentially result in a denial-of-service (DoS) when handling specially crafted input strings. The issue is fixed in version 4.51.0.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1333 Inefficient Regular Expression Complexity
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-3262.json
cvssv3.1 5.3 https://github.com/huggingface/transformers
generic_textual MODERATE https://github.com/huggingface/transformers
cvssv3.1 5.3 https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
generic_textual MODERATE https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
cvssv3.1 5.3 https://github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca
generic_textual MODERATE https://github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca
cvssv3.1 5.3 https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184
generic_textual MODERATE https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2025-3262
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2025-3262
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-3262.json
https://github.com/huggingface/transformers
https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
https://github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca
https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184
2376761 https://bugzilla.redhat.com/show_bug.cgi?id=2376761
CVE-2025-3262 https://nvd.nist.gov/vuln/detail/CVE-2025-3262
GHSA-489j-g2vx-39wf https://github.com/advisories/GHSA-489j-g2vx-39wf
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-3262.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/huggingface/transformers
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2025-3262
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2026-06-04T16:24:19.593521+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/transformers/CVE-2025-3262.yml 38.6.0