CVE-2026-29183

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{"affected": [{"affectedData": [{"product": "siyuan", "vendor": "siyuan-note", "versions": [{"status": "affected", "version": "< 3.5.9"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*", "matchCriteriaId": "B3DC4A6C-514B-4B80-AA6D-5C410717D2EF", "versionEndExcluding": "3.5.9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "SiYuan is a personal knowledge management system. Prior to version 3.5.9, an unauthenticated reflected XSS vulnerability exists in the dynamic icon API endpoint \"GET /api/icon/getDynamicIcon\" when type=8, attacker-controlled content is embedded into SVG output without escaping. Because the endpoint is unauthenticated and returns image/svg+xml, a crafted URL can inject executable SVG/HTML event handlers (for example onerror) and run JavaScript in the SiYuan web origin. This can be chained to perform authenticated API actions and exfiltrate sensitive data when a logged-in user opens the malicious link. This issue has been patched in version 3.5.9."}, {"lang": "es", "value": "SiYuan es un sistema de gesti\u00f3n de conocimiento personal. Antes de la versi\u00f3n 3.5.9, existe una vulnerabilidad XSS reflejada no autenticada en el endpoint de la API de icono din\u00e1mico 'GET /api/icon/getDynamicIcon' cuando type=8, el contenido controlado por el atacante se incrusta en la salida SVG sin escapar. Debido a que el endpoint no est\u00e1 autenticado y devuelve image/svg+xml, una URL manipulada puede inyectar manejadores de eventos SVG/HTML ejecutables (por ejemplo, onerror) y ejecutar JavaScript en el origen web de SiYuan. Esto puede encadenarse para realizar acciones de API autenticadas y exfiltrar datos sensibles cuando un usuario autenticado abre el enlace malicioso. Este problema ha sido parcheado en la versi\u00f3n 3.5.9."}], "id": "CVE-2026-29183", "lastModified": "2026-06-17T10:29:44.220", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.8, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-29183", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-06T15:58:07.192494Z", "version": "2.0.3"}}]}, "published": "2026-03-06T08:16:27.090", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6865-qjcf-286f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.5.9)"}}], "enrichment": {"confidence": 84.0, "confidence_source": "matching", "scores": [{"score": 84.0, "source": "matching"}]}, "original": {"product": "siyuan", "source": "cna", "vendor": "siyuan-note"}, "product": "siyuan", "vendor": "siyuan"}], "analysis": {"en": {"generated_at": "2026-04-16T11:26:53.553081+00:00", "value": {"mitigation_remediation": ["Update Siyuan to version 3.5.9 or later to apply the official fix", "If an immediate upgrade is not possible, restrict access to the /api/icon/getDynamicIcon endpoint by adding network ACLs or a firewall rule that blocks unauthenticated requests", "Recognize suspicious SVG links and avoid opening them until the application has been confirmed to be patched"], "summary": {"action": "Apply Patch", "impact": "Arbitrary JavaScript Execution"}, "threat_synthesis": {"affected_systems": "The issue affects all installations of the Siyuan personal knowledge management system using versions prior to 3.5.9. The vulnerability is present in the dynamic icon endpoint \"GET /api/icon/getDynamicIcon\" when the type parameter is set to 8. No specific version numbers beyond the cut\u2011off are listed; administrators should verify that their deployment is 3.5.9 or newer.", "description_and_impact": "SiYuan exposes an unauthenticated dynamic icon API that returns SVG content without proper escaping. When the request parameter \"type=8\" is used, attacker\u2011controlled data can be embedded into the SVG output, allowing injection of executable scripts or HTML event handlers such as onerror. The vulnerability permits arbitrary JavaScript execution in the context of the SiYuan web origin, which can be used to hijack sessions, modify data, or exfiltrate sensitive information. The impact is significant due to the potential for remote code execution and the ability to chain actions after a user authenticates. The weakness is classified as Reflected XSS (CWE\u201179).", "risk_and_exploitability": "The CVSS score of 9.3 indicates critical severity, while the EPSS score of less than 1% suggests low current exploitation probability. The vulnerability is not listed in the CISA KEV catalog. Attackers can exploit the flaw by simply visiting a crafted URL that targets the unauthenticated endpoint, thereby delivering malicious SVG to any user who opens the link. Once a user initiates the request, the injected code runs with the privileges of the logged\u2011in account, enabling further authenticated API actions and data exfiltration."}}}}, "created": "2026-03-06T14:55:26.422046+00:00", "updated": "2026-04-16T11:30:15.907775+00:00", "vendors": ["siyuan", "siyuan$PRODUCT$siyuan"]}