Vulnerability 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.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/pygments/pygments/
- https://github.com/pygments/pygments/issues/3058
- https://vuldb.com/?ctiid.352327
- https://vuldb.com/?id.352327
- https://vuldb.com/?submit.774685
FAQ
What is CVE-2026-4539?
CVE-2026-4539 is a vulnerability with a CVSS score of 3.3 (LOW). 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 ex...
How severe is CVE-2026-4539?
CVE-2026-4539 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4539?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.