XSS in Tianma-If Edgeever
CVE-2026-109558
EdgeEver 1.6.0 through 1.112.0 contains a stored cross-site scripting vulnerability in TemplatesPane.tsx that renders template contentMarkdown with raw HTML via dangerouslySetInnerHTML without sanitization. Attackers can write templates containing HTML event handlers through an API or MCP token to run script on preview and access the privileged window.edgeeverDesktop bridge.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/tianma-if/edgeever/issues/533 (issue-tracking)
- github.com/tianma-if/edgeever/issues/546 (issue-tracking)
- github.com/tianma-if/edgeever/commit/6b5027e8b4becbee0c0de7cd1a3d04af78ca87ca (patch)
- github.com/tianma-if/edgeever/blob/f6ade70423ba366077653dbb8ac43a677933c776/app… (technical-description)
- github.com/tianma-if/edgeever (product)
- www.vulncheck.com/advisories/edgeever-1.6.0-through-1.112.0-stored-xss-via-temp… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109558?
- CVE-2026-109558 is a high-severity vulnerability in Tianma-If Edgeever, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-10-12.
- How severe is CVE-2026-109558?
- High severity. CVSS v3 base score is 8.7 out of 10.