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CVE-2021-27291

CVSS v3.1 7.5 (High)
75% Progress
CVSS v2.0 5 (Medium)
50% Progress
EPSS 0.96 % (84th)
0.96% Progress
Affected Products 3
Advisories 29
Info CVSS EPSS CAPEC Affected Configurations References Security Advisories Packages & Software OVAL Tools, Exploits & PoC Graph Web & Social Timeline

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.

Weaknesses
CWE-1333
Inefficient Regular Expression Complexity
CVE Status
PUBLISHED
CNA
MITRE
Published Date
2021-03-17 13:15:15
(3 years ago)
Updated Date
2023-11-07 03:31:56
(10 months ago)

Affected Products

Debian

Fedoraproject

Pygments

Configuration #1

    CPE23 From Up To
  Pygments from 1.1 version and prior 2.7.4 version cpe:2.3:a:pygments:pygments >= 1.1 < 2.7.4

Configuration #2

    CPE23 From Up To
  Debian Linux 9.0 cpe:2.3:o:debian:debian_linux:9.0
  Debian Linux 10.0 cpe:2.3:o:debian:debian_linux:10.0

Configuration #3

    CPE23 From Up To
  Fedoraproject Fedora 32 cpe:2.3:o:fedoraproject:fedora:32
  Fedoraproject Fedora 33 cpe:2.3:o:fedoraproject:fedora:33