In short
- CVE-2021-27291 is a HIGH (CVSS 7.5) vulnerability affecting pygments, pygments (pygments).
- Chance of exploitation in the next 30 days (EPSS): 3.9%, higher than 90.3% of all vulnerabilities.
- Fix: update to 2.7.4 or later.
| Package | Affected versions | Patched versions |
|---|
| pygments PyPI | ≥ 1.1, < 2.7.4
| 2.7.4
|
| pygments | ≥ 1.1, < 2.7.4
| 2.7.4
|
Description
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.
NVD description
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.
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