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CVE-2026-4539

pygments archetype.py AdlLexer redos

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 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Pygments
Products
Pygments
CVE-2015-8557

python-pygments: Shell injection in FontManager._get_nix_font_path

The FontManager._get_nix_font_path function in formatters/img.py in Pygments 1.2.2 through 2.0.2 allows remote attackers to execute arbitrary commands via shell metacharacters in a font name.

CVSS 3.0 · 9.0 Critical EPSS 6.7% KEV · Not listed
Vendors
Canonical Pygments
Products
Ubuntu Linux Pygments
CVE-2021-27291

python-pygments: ReDoS in multiple lexers

In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.

CVSS 3.1 · 7.5 High EPSS 3.9% KEV · Not listed
Vendors
Debian Fedoraproject Pygments and 1 more
Products
Debian Linux Fedora Pygments and 3 more
CVE-2021-20270

python-pygments: Infinite loop in SML lexer may lead to DoS

An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.

CVSS 3.1 · 7.5 High EPSS 2.8% KEV · Not listed
Vendors
Debian Fedoraproject Pygments and 1 more
Products
Debian Linux Fedora Pygments and 6 more