This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-49476 →
DEBIAN-CVE-2026-49476
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 allocates unbound...
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 allocates unbounded memory when compiling large comma-separated selector lists, allowing an attacker who can supply a crafted selector string to soupsieve.compile() or Beautiful Soup .select() / .select_one() to allocate hundreds of megabytes of heap memory from a relatively small input and cause 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