HighVulnerability

CVE-2024-12720: huggingface/transformers ReDoS in post_process_single()

Source: NVD(opens in a new tab)
Identifier: CVE-2024-12720
Published: March 20, 2025
Record updated: October 9, 2026

Affected: transformers < 4.48.0
Fixed in: 4.48.0
released January 10, 2025, 69 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.7%

Summary

CVE-2024-12720 is a Regular Expression Denial of Service (ReDoS) flaw in the huggingface/transformers library, in tokenization_nougat_fast.py. A regex in the post_process_single() function processes specially crafted input, and exponential backtracking drives up CPU usage and can cause application downtime. The affected version is v4.46.3 (latest).

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 7.5(high)
Patch available: Yes
EPSS: 0.7%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-1333

Affected

Packages: transformers@< 4.48.0 (fixed: 4.48.0)
Vendors: HuggingFace

Classification

Attack type: Denial of service
Attack sophistication: Trivial
AI component targeted: Framework
Impact: Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2024-12720

First tracked: February 15, 2026 at 08:43 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 95% (self-assessed)

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

transformersPyPILLM dependency since 2016-08-17 · 141 tracked dependents

Summary

Mitigation

Affected packages in the Exposure Registry

Related items