CVE-2026-49476

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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Produits concernés

• facelessuser soupsieve
• Facelessuser soup sieve

Scores CVSS

Faiblesses (CWE)

• CWE-400
• CWE-770

Références

• https://github.com/facelessuser/soupsieve/commit/28108ab805818c832d9568142a99844fd95a0d39 Patch
• https://github.com/facelessuser/soupsieve/releases/tag/2.8.4 Release Notes
• https://github.com/facelessuser/soupsieve/security/advisories/GHSA-2wc2-fm75-p42x ExploitVendor Advisory
• https://github.com/facelessuser/soupsieve/security/advisories/GHSA-2wc2-fm75-p42x ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories