CVE-2026-4539

LOW 3.3

pygments archetype.py AdlLexer redos

CVSS Score

3.3

EPSS Score

0.0%

EPSS Percentile

2th

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.

CWE	CWE-1333 CWE-400
Vendor	n/a
Product	pygments
Published	Mar 22, 2026
Last Updated	Mar 23, 2026

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CVSS v3 Breakdown

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

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / pygments

2.19.0 2.19.1 2.19.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.352327 vuldb.com: https://vuldb.com/?ctiid.352327 vuldb.com: https://vuldb.com/?submit.774685 github.com: https://github.com/pygments/pygments/issues/3058 github.com: https://github.com/pygments/pygments/

Credits

🔍 ybdesire (VulDB User)