CVE-2026-34605 | SiYuan up to 3.6.1 /api/icon/getDynamicIcon SanitizeSVG cross site scripting (ID 17246)

VDB-354584 · CVE-2026-34605 · ID 17246 SIYUAN UP TO 3.6.1 /API/ICON/GETDYNAMICICON SANITIZESVG CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.1 $0-$5k 1.50+ Summaryinfo A vulnerability was found in SiYuan up to 3.6.1. It has been declared as problematic. Affected is the function SanitizeSVG of the file /api/icon/getDynamicIcon. Such manipulation leads to cross site scripting. This vulnerability is traded as CVE-2026-34605. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability, which was classified as problematic, has been found in SiYuan up to 3.6.1. Affected by this issue is the function SanitizeSVG of the file /api/icon/getDynamicIcon. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes: SiYuan is a personal knowledge management system. From version 3.6.0 to before version 3.6.2, the SanitizeSVG function introduced in version 3.6.0 to fix XSS in the unauthenticated /api/icon/getDynamicIcon endpoint can be bypassed by using namespace-prefixed element names such as . The Go HTML5 parser records the element's tag as "x:script" rather than "script", so the tag check passes it through. The SVG is served with Content-Type: image/svg+xml and no Content Security Policy; when a browser opens the response directly, its XML parser resolves the prefix to the SVG namespace and executes the embedded script. This issue has been patched in version 3.6.2. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-34605 since 03/30/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007. Upgrading to version 3.6.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Name SiYuan Version 3.6.0 3.6.1 CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.1 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Cross site scripting CWE: CWE-79 / CWE-94 / CWE-74 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: SiYuan 3.6.2 Timelineinfo 03/30/2026 CVE reserved 04/01/2026 +2 days Advisory disclosed 04/01/2026 +0 days VulDB entry created 04/01/2026 +0 days VulDB entry last update Sourcesinfo Advisory: 17246 Status: Confirmed CVE: CVE-2026-34605 (🔒) GCVE (CVE): GCVE-0-2026-34605 GCVE (VulDB): GCVE-100-354584 Entryinfo Created: 04/01/2026 04:38 Changes: 04/01/2026 04:38 (69) Complete: 🔍 Cache ID: 99:3AE:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸