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Low severity3.3NVD Advisory· Published Mar 22, 2026· Updated Jun 17, 2026

CVE-2026-4539

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.

AI Insight

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
PygmentsPyPI
< 2.20.02.20.0

Affected products

156

Patches

Vulnerability mechanics

References

9

News mentions

0

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