CVE-2026-4539

pygments: Pygments: Denial of Service via inefficient regular expression processing in AdlLexer

Loading…

Severity

Low

Red Hat Product Security

3.3

CVSS 3.1

Review impact separately from score.

Published · March 22, 2026

Updated · October 27, 2026

Description

A flaw was found in pygments. A local user can exploit this vulnerability by providing specially crafted input to the AdlLexer function, which leads to inefficient regular expression processing. This can result in a Denial of Service (DoS), making the application unresponsive.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-1333 · Inefficient Regular Expression Complexity