要点
- CVE-2026-4539 は pygments に影響する深刻度「低」 (CVSS 3.3) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.16%（全脆弱性の 5.0% より高い）。
- 対処：2.20.0 以降に更新してください。
| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|
| pygments PyPI | < 2.20.0
| 2.20.0
|
概要
A security flaw has been discovered in pygments before 2.20.0. The impacted element is the function AdlLexer of the file pygments/lexers/archetype.py. The manipulation results in inefficient regular expression complexity. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
NVD の説明
A security flaw has been discovered in pygments up to 2.19.2. The impacted element is the function AdlLexer of the file pygments/lexers/archetype.py. The manipulation results in inefficient regular expression complexity. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
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