DEBIAN-CVE-2026-86000
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-86000
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-86000.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-86000
- Upstream
- Published
- 2026-09-17T16:18:16Z
- Modified
- 2026-09-19T07:00:09Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- [none]
- Details
-
Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.9, the selector parser in src/soupsieve/css_parser.py defines IDENTIFIER with adjacent quantified groups over overlapping character classes, and VALUE embeds IDENTIFIER for attribute selectors. When an attacker-controlled selector contains a long identifier or unquoted attribute-value run followed by input that makes the overall match fail, the regular expression engine explores quadratically many splits between the overlapping groups. User-controlled selectors can reach this path through soupsieve.compile(), soupsieve.select(), or BeautifulSoup.select(), while applications using only hard-coded selectors are unaffected. The resulting CPU consumption can hold the Python GIL, exhaust application workers, and stall a service; successful plain identifier matches are linear, and the issue does not cause memory corruption or code execution. The issue is fixed in version 2.9.
- References
Affected packages
Debian:12 / soupsieve
Package
- Name
- soupsieve
- Purl
- pkg:deb/debian/soupsieve?arch=source&distro=bookworm
Debian:13 / soupsieve
Package
- Name
- soupsieve
- Purl
- pkg:deb/debian/soupsieve?arch=source&distro=trixie
Debian:14 / soupsieve
Package
- Name
- soupsieve
- Purl
- pkg:deb/debian/soupsieve?arch=source&distro=forky