# CVE-2026-49476: soupsieve: Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4

CVE-2026-49476 is fixed in 2 products on 1 platform, first by SUSE-SU-2026:22660-1, released July 14, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-49476
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0064
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 14, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-soupsieve opensuse-leap 16.0 | 2.6-160000.4.1 | [OPENSUSE-SU-2026:21342-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21342-1.md) | Jul 14, 2026 |
| Linux | python-soupsieve sles 15.6 | 2.5-150600.3.3.1 | [SUSE-SU-2026:3240-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3240-1.md) | Jul 24, 2026 |
| Linux | python-soupsieve sles 15.7 | 2.5-150600.3.3.1 | [SUSE-SU-2026:3240-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3240-1.md) | Jul 24, 2026 |
| Linux | python-soupsieve sles 16.0 | 2.6-160000.4.1 | [SUSE-SU-2026:22660-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22660-1.md) | Jul 14, 2026 |
| Linux | soupsieve Debian 14 | 2.8.4-1 | [DEBIAN-CVE-2026-49476](https://patchblox.com/security/data/fix/linux/debian-cve-2026-49476.md) | Jul 18, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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