Upstream information
Description
Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and realier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XSS even when HTMLRenderer(escape=True) is used, because these values bypass the inline renderer.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| CVSS detail | National Vulnerability Database | SUSE |
|---|---|---|
| Base Score | 6.1 | 6.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | Required | Required |
| Scope | Changed | Changed |
| Confidentiality Impact | Low | Low |
| Integrity Impact | Low | Low |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 5.3 | 5.3 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Attack Requirements | None | None |
| Privileges Required | None | None |
| User Interaction | Passive | Passive |
| Vulnerable System Confidentiality Impact | None | Low |
| Vulnerable System Integrity Impact | None | Low |
| Vulnerable System Availability Impact | None | None |
| Subsequent System Confidentiality Impact | Low | Low |
| Subsequent System Integrity Impact | Low | Low |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
SUSE Security Advisories:
- SUSE-SU-2026:21858-1, published 2026-05-28T12:08:36Z
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0 |
| Patchnames: SUSE-SLES-16.0-816 |
| openSUSE Leap 16.0 |
| Patchnames: openSUSE-Leap-16.0-816 |
List of packages in QA
| Product(s) | Package(s) |
|---|---|
| SUSE Linux Enterprise Server 16.0 |
|
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-mistune | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | python-mistune | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | python-mistune | Not affected |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-mistune | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | python-mistune | Not affected |
| SUSE Linux Enterprise Server 16.0 | python-mistune | In progress |
| SUSE Linux Enterprise Server 16.1 | python-mistune | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python-mistune | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | python-mistune | Released |
| SUSE Linux Enterprise Server for SAP applications 16.1 | python-mistune | Affected |
| openSUSE Leap 16.0 | python-mistune | Released |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | python-mistune | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python-mistune | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | python-mistune | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python-mistune | Not affected |
| SUSE Linux Enterprise Module for Python 3 15 SP4 | python-mistune | Not affected |
| SUSE Linux Enterprise Module for Python 3 15 SP5 | python-mistune | Not affected |
| SUSE Linux Enterprise Module for Python 3 15 SP6 | python-mistune | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | python-mistune | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | python-mistune | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | python-mistune | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python-mistune | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | python-mistune | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python-mistune | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-mistune | Not affected |
| SUSE Manager Proxy 4.3 | python-mistune | Not affected |
| SUSE Manager Retail Branch Server 4.3 | python-mistune | Not affected |
| SUSE Manager Server 4.3 | python-mistune | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Desktop 15 SP4 | python-mistune | Not affected |
| SUSE Linux Enterprise Desktop 15 SP5 | python-mistune | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python-mistune | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python-mistune | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python-mistune | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | python-mistune | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | python-mistune | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | python-mistune | Not affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | python-mistune | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | python-mistune | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | python-mistune | Not affected |
| openSUSE Leap 15.3 | python-mistune | Not affected |
| openSUSE Leap 15.4 | python-mistune | Not affected |
| openSUSE Leap 15.5 | python-mistune | Not affected |
| openSUSE Leap 15.6 | python-mistune | Not affected |
SUSE Timeline for this CVE
CVE page created: Mon May 11 13:00:38 2026CVE page last modified: Tue Jun 2 11:37:01 2026