CVE-2026-34605 Details.
SiYuan Note - Cross-Site Scripting
Atlas does not check this one. Works by exploiting the flaw.
The only reliable test for this one is to try the weakness itself, which can disturb the site. Atlas does not do that, so it does not run this check.
About CVE-2026-34605. What It Means.
SiYuan Note through version 3.6.1 is vulnerable to unauthenticated reflected Cross-Site Scripting (XSS) in the `/api/icon/getDynamicIcon` endpoint due to improper filtering of SVG elements with a namespace prefix (such as `<x:script>`). By using a namespaced script element, attackers can bypass the `SanitizeSVG` function and execute arbitrary JavaScript in the victim’s browser upon visiting a crafted link.
Affected Product. What Is Hit.
- Vendor
- siyuan-note
- Product
- SiYuan Note SiYuan
References. Where To Read More.
More CVEs In SiYuan Note SiYuan.
- CVE-2026-54069HighInformation onlySiYuan Note <= 3.6.5 - Authentication BypassSiYuan NoteCVSS9.1
- CVE-2026-33476HighInformation onlySiYuan <= v3.6.1 - Path TraversalSiYuan NoteCVSS7.5
- CVE-2026-54066HighSiYuan <= 3.6.5 - Unauthenticated Path TraversalSiYuan NoteCVSS7.5
- CVE-2026-34453HighInformation onlySiYuan <= v3.6.1 - Bookmark Data DisclosureSiYuan NoteCVSS7.5
- CVE-2026-29183MediumInformation onlySiYuan Note - Cross-Site ScriptingSiYuan NoteCVSS6.1
- CVE-2026-31809MediumInformation onlySiYuan <= v3.5.9 - Cross Site ScriptingSiYuan NoteCVSS6.1
FAQ
Common Questions.
SiYuan Note - Cross-Site Scripting. SiYuan Note through version 3.6.1 is vulnerable to unauthenticated reflected Cross-Site Scripting (XSS) in the `/api/icon/getDynamicIcon` endpoint due to improper filtering of SVG elements with a namespace prefix (such as `<x:script>`). By using a namespaced script element, attackers can bypass the `SanitizeSVG` function and execute arbitrary JavaScript in the victim’s browser upon visiting a crafted link.
No. The only reliable test for this one is to try the weakness itself, which can disturb the site. Atlas does not do that, so it does not run this check. The facts about CVE-2026-34605 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-34605 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update SiYuan Note SiYuan to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-34605. Atlas does not run a check for it, so nothing here says whether a particular site is affected.