CVE-2026-4539
A security flaw has been discovered in pygments up to 2.19.2.
Published Mar 22, 2026 · updated Jun 17, 2026
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.
Code
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Timeline
Detection, updates, and resolution for this record.
Mar 22, 2026 · NIST NVD
Detected
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 is
Jun 17, 2026 · NIST NVD
Updated
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 is
Sources
- CVE.orgVulnerability recordCVE-2026-4539
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-4539
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
nvd.nist.gov