VDB
ALPINE-CVE-2021-20270
ALPINE-CVE-2021-20270
PUBLISHED
CVSS 7.5 HIGH
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.
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.18 | py3-pygments | 2.7.3-r0, 2.7.2-r0, 2.7.1-r0 |
| Alpine:v3.23 | py3-pygments | 2.4.2-r2, 2.7.2-r0, 2.7.1-r0 |
| Alpine:v3.21 | py3-pygments | 0, 1.3.1-r0, 1.3.1-r1 |
| Alpine:v3.19 | py3-pygments | 0, 1.3.1-r0, 1.3.1-r1 |
| Alpine:v3.17 | py3-pygments | 2.7.3-r0, 0, 1.3.1-r0 |
| Alpine:v3.16 | py3-pygments | 2.4.2-r2, 2.7.3-r0, 2.7.2-r0 |
| Alpine:v3.20 | py3-pygments | 0, 2.7.3-r0, 2.7.2-r0 |
| Alpine:v3.14 | py3-pygments | 2.7.3-r0, 1.3.1-r0, 1.3.1-r1 |
| Alpine:v3.22 | py3-pygments | 2.7.3-r0, 1.4-r2, 1.5-r0 |
| Alpine:v3.15 | py3-pygments | 0, 1.3.1-r0, 1.3.1-r1 |
Timeline
- Mar 23, 2021 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch