CVE-2026-4539

Description

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.

Risk Information

Base Score

3.3

MODERATE

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS Score

Exploitation Probability

0.013

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2026-4539 are affected in Python-pygments 2.19.2	Windows
Vulnerabilities CVE-2026-4539 are affected in Python-pygments for linux 2.19.2	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234