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CVE-2026-4539

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CVE-2026-4539

Published: Mar 22, 2026

Modified: Mar 23, 2026

PUBLISHED

CVSS v3.1

3.3

LOW

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.

VendorProductVersions

n/a

pygments

affected
2.19.0
affected
2.19.1
affected
2.19.2

Weaknesses (CWE)

CWE-1333
CWE-400

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

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