Pygments has Regular Expression Denial of Service (ReDoS) due to Inefficient Regex for GUID Matching
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.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | pygments | < 2.20.0 | 2.20.0 |
Referencias
- https://nvd.nist.gov/vuln/detail/CVE-2026-4539
- https://github.com/pygments/pygments/issues/3058
- https://github.com/pygments/pygments/pull/3064
- https://github.com/pygments/pygments/commit/24b8aa76c6cd6d70f39c6dd605cce319c98e2ccc
- https://github.com/pygments/pygments
- https://github.com/pygments/pygments/releases/tag/2.20.0
- https://vuldb.com/?ctiid.352327
- https://vuldb.com/?id.352327
- https://vuldb.com/?submit.774685
- https://pypi.org/project/pygments
- https://github.com/advisories/GHSA-5239-wwwm-4pmq
- Vector CVSS
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L- Debilidad (CWE)
CWE-1333, CWE-400- Plataforma
- Python (PyPI)
- Paquete
pygments- Publicada
- 22.03.2026
- Actualizado
- 11.10.2026 15:17
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-2987 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-5239-wwwm-4pmq - CC BY 4.0
Historial de vulnerabilidades: pygments
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 5
- Primera → última
- 01.2016 03.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 2
- Media 1
- Baja 1
Divulgaciones por año
- 2017: 0
- 2018: 0
- 2019: 0
- 2020: 0
- 2021: 2
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 1
antes: 1
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Pygments has Regular Expression Denial of Service (ReDoS) due to Inefficient Regex for GUID Matching esta entrada
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