CVE-2024-12720: Transformers ReDoS Vulnerability
transformers
A regular expression denial of service vulnerability was identified in the huggingface/transformers tokenization code. The flaw causes excessive backtracking and high CPU usage when processing specially crafted inputs.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 5.3
- EPSS
- 0.01 · top 45% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 20 Mar 2025
- last update
- 20 Mar 2025
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2025-03-20CVE-2024-12720: Transformers Regular Expression Denial of Service (ReDoS) vulnerabilityGitHub Advisory Database · github.com/advisories/GHSA-6rvg-6v2m-4j46
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- tags
- redoshuggingface
- dates
- happened 20 Mar 2025 · first reported 20 Mar 2025
- origin
- GitHub Advisory DatabaseVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 07:00Z · updated 2026-10-18 07:00Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# CVE-2024-12720: Transformers ReDoS Vulnerability https://gcdradar.vercel.app/incidents/cve-2024-12720-transformers-redos-vulnerability · AIR-2025-0217 · closed 2025-03-20 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2025-03-20 - AI role: Attack on AI - Products: transformers - CVE ids: CVE-2024-12720 - CVSS: 5.3 ## Summary A regular expression denial of service vulnerability was identified in the huggingface/transformers tokenization code. The flaw causes excessive backtracking and high CPU usage when processing specially crafted inputs. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2025-03-20: CVE-2024-12720: Transformers Regular Expression Denial of Service (ReDoS) vulnerability (https://github.com/advisories/GHSA-6rvg-6v2m-4j46) ## Sources - 2025-03-20 GitHub Advisory Database: CVE-2024-12720: Transformers Regular Expression Denial of Service (ReDoS) vulnerability https://github.com/advisories/GHSA-6rvg-6v2m-4j46 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
Related
- closed5.3Hugging Face libraries CVE-2025-6638: Hugging Face Transformers vulnerable to ReDoS via MarianTokenizer
Patch now · Disclosed · since 12 Sep 2025 · CVE-2025-6638
AI - closed5.3Hugging Face libraries Hugging Face Transformers vulnerable to ReDoS in configuration utils
Patch now · Disclosed · since 7 Jul 2025 · CVE-2025-3263
AI - closed5.3Hugging Face libraries Hugging Face Transformers vulnerable to ReDoS in get_imports
Patch now · Disclosed · since 7 Jul 2025 · CVE-2025-3264
AI - closed5.3Hugging Face libraries Hugging Face Transformers vulnerable to ReDoS in SETTING_RE
Patch now · Disclosed · since 7 Jul 2025 · CVE-2025-3262
AI - closed4.3Hugging Face libraries CVE-2025-1194: Transformers Regular Expression Denial of Service Vulnerability
Patch now · Disclosed · since 29 Apr 2025 · CVE-2025-1194
AI - closed8.0Hugging Face libraries HuggingFace transformers vulnerable to arbitrary code execution in LightGlue loader
Patch now · Disclosed · since 3 Jun 2026 · CVE-2026-5241
AI