Security Advisory

CVE-2026-49476

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-14 20:53:12

Last updated 2026-07-15 14:27:06

Assigner GitHub_M

CVSS score 7.5

State PUBLISHED

Description

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.

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