Description
A vulnerability was determined in star7th showdoc up to 3.9.1. This vulnerability affects unknown code of the file web_src/public/editor.md/editormd.js of the component API Page Save Endpoint. Executing a manipulation can lead to cross site scripting. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 3.9.2 is able to resolve this issue. This patch is called a8ea1520850b4242f395247f72e87e597506cef0. Upgrading the affected component is recommended. The vendor confirms: "The fix [...] sets Mermaid `securityLevel` to `strict`, disables `htmlLabels`, and sanitizes rendered SVG with DOMPurify."
Published: 2026-09-08
Score: 5.1 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 08 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 08 Sep 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Star7th
Star7th showdoc
Vendors & Products Star7th
Star7th showdoc

Tue, 08 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Description A vulnerability was determined in star7th showdoc up to 3.9.1. This vulnerability affects unknown code of the file web_src/public/editor.md/editormd.js of the component API Page Save Endpoint. Executing a manipulation can lead to cross site scripting. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 3.9.2 is able to resolve this issue. This patch is called a8ea1520850b4242f395247f72e87e597506cef0. Upgrading the affected component is recommended. The vendor confirms: "The fix [...] sets Mermaid `securityLevel` to `strict`, disables `htmlLabels`, and sanitizes rendered SVG with DOMPurify."
Title star7th showdoc API Page Save Endpoint editormd.js cross site scripting
First Time appeared Showdoc
Showdoc showdoc
Weaknesses CWE-79
CWE-94
CPEs cpe:2.3:a:showdoc:showdoc:*:*:*:*:*:*:*:*
Vendors & Products Showdoc
Showdoc showdoc
References
Metrics cvssV2_0

{'score': 4, 'vector': 'AV:N/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 3.5, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-09-08T15:42:58.832Z

Reserved: 2026-09-08T09:15:24.988Z

Link: CVE-2026-86644

cve-icon Vulnrichment

Updated: 2026-09-08T15:42:56.225Z

cve-icon NVD

Status : Deferred

Published: 2026-09-08T14:17:35.087

Modified: 2026-09-08T18:33:29.460

Link: CVE-2026-86644

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-08T15:15:17Z

Weaknesses