Upstream information
Description
Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.9, the selector parser in src/soupsieve/css_parser.py defines IDENTIFIER with adjacent quantified groups over overlapping character classes, and VALUE embeds IDENTIFIER for attribute selectors. When an attacker-controlled selector contains a long identifier or unquoted attribute-value run followed by input that makes the overall match fail, the regular expression engine explores quadratically many splits between the overlapping groups. User-controlled selectors can reach this path through soupsieve.compile(), soupsieve.select(), or BeautifulSoup.select(), while applications using only hard-coded selectors are unaffected. The resulting CPU consumption can hold the Python GIL, exhaust application workers, and stall a service; successful plain identifier matches are linear, and the issue does not cause memory corruption or code execution. The issue is fixed in version 2.9.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 5.3 | 5.3 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | Low | Low |
| CVSSv3 Version | 3.1 | 3.1 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP7 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 16.0 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 16.1 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | python-soupsieve | Affected |
| openSUSE Leap 16.0 | python-soupsieve | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP4 | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP5 | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP6 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP4 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP5 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP6 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-soupsieve | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7 | python-soupsieve | Affected |
| SUSE Enterprise Storage 7.1 | python-soupsieve | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | python-soupsieve | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | python-soupsieve | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | python-soupsieve | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | python-soupsieve | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python-soupsieve | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | python-soupsieve | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | python-soupsieve | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | python-soupsieve | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | python-soupsieve | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP2 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP3 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | python-soupsieve | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | python-soupsieve | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | python-soupsieve | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | python-soupsieve | Affected |
| SUSE Manager Proxy 4.1 | python-soupsieve | Affected |
| SUSE Manager Proxy 4.2 | python-soupsieve | Affected |
| SUSE Manager Proxy 4.3 | python-soupsieve | Affected |
| SUSE Manager Proxy LTS 4.3 | python-soupsieve | Affected |
| SUSE Manager Retail Branch Server 4.1 | python-soupsieve | Affected |
| SUSE Manager Retail Branch Server 4.2 | python-soupsieve | Affected |
| SUSE Manager Retail Branch Server 4.3 | python-soupsieve | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | python-soupsieve | Affected |
| SUSE Manager Server 4.1 | python-soupsieve | Affected |
| SUSE Manager Server 4.2 | python-soupsieve | Affected |
| SUSE Manager Server 4.3 | python-soupsieve | Affected |
| SUSE Manager Server LTS 4.3 | python-soupsieve | Affected |
| openSUSE Leap 15.3 | python-soupsieve | Affected |
| openSUSE Leap 15.4 | python-soupsieve | Affected |
| openSUSE Leap 15.5 | python-soupsieve | Affected |
| openSUSE Leap 15.6 | python-soupsieve | Affected |
SUSE Timeline for this CVE
CVE page created: Thu Sep 17 22:21:59 2026CVE page last modified: Fri Sep 18 13:00:45 2026