CVE-2026-15308
Public on 2026-07-09
Modified on 2026-07-10
Description
The incremental HTML parser (html.parser.HTMLParser) allows for CPU
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data.
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | python | 2026-08-04 | ALAS2-2026-3845 | Fixed |
| Amazon Linux 2 - Core | python3 | 2026-08-04 | ALAS2-2026-3852 | Fixed |
| Amazon Linux 2023 | python3.11 | 2026-08-04 | ALAS2023-2026-1998 | Fixed |
| Amazon Linux 2023 | python3.12 | 2026-08-04 | ALAS2023-2026-1996 | Fixed |
| Amazon Linux 2023 | python3.13 | 2026-08-04 | ALAS2023-2026-1997 | Fixed |
| Amazon Linux 2023 | python3.14 | 2026-08-04 | ALAS2023-2026-1999 | Fixed |
| Amazon Linux 2023 | python3.9 | 2026-08-04 | ALAS2023-2026-1995 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |