This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-49477 →

DEBIAN-CVE-2026-49477

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regula...

Original description

The description as published by the source.

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value in soupsieve/css_parser.py, allowing an attacker who can supply untrusted CSS selector strings to soupsieve.compile() or Beautiful Soup .select() / .select_one() to cause CPU exhaustion and denial of service. This issue is fixed in version 2.8.4.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 soupsieve

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 soupsieve

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 soupsieve

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.4-1"}]}]

References

advisory security-tracker.debian.org