CVE-2026-86644

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."

• CWE-79
• CWE-94

• https://gist.github.com/saDL0w/36a72a076e9ab24408a3d27582e778b2
• https://github.com/star7th/showdoc/
• https://github.com/star7th/showdoc/commit/a8ea1520850b4242f395247f72e87e597506cef0
• https://github.com/star7th/showdoc/releases/tag/v3.9.2
• https://vuldb.com/cve/CVE-2026-86644
• https://vuldb.com/submit/906282
• https://vuldb.com/vuln/399755
• https://vuldb.com/vuln/399755/cti

Published

Sep 8, 2026

Last Modified

Sep 8, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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