CVE-2026-86644: falha de média gravidade em star7th showdoc
star7th showdoc API Page Save Endpoint editormd.js cross site scripting
Publicada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
33Vexday Risk Score
Sem sinal de exploração. Ela tem prova de conceito pública.
ssvc Attendcvss 5.1epss 0.4%
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."
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
Produtos afetados
star7th · showdocPoCs públicas encontradas — 1
cve_referencegist.github.com/saDL0w/36a72a076e9ab24408a3d27582e778b2não verificado⚠ Recursos públicos, para você avaliar a exposição de sistemas que controla ou está autorizado a testar. Teste apenas com autorização.
Referências
https://gist.github.com/saDL0w/36a72a076e9ab24408a3d27582e778b2https://github.com/star7th/showdoc/https://github.com/star7th/showdoc/commit/a8ea1520850b4242f395247f72e87e597506cef0https://github.com/star7th/showdoc/releases/tag/v3.9.2https://vuldb.com/cve/CVE-2026-86644https://vuldb.com/submit/906282https://vuldb.com/vuln/399755https://vuldb.com/vuln/399755/cti