What is the CVSS score of CVE-2026-23847?

CVE-2026-23847 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Siyuan are affected by CVE-2026-23847?

Organizations using SiYuan should be aware of moderate risk from CVE-2026-23847, a cross-site scripting vulnerability rated CVSS 6.1.. A patch is available.

Is there a public PoC exploit available for CVE-2026-23847?

Yes, a public proof-of-concept exploit is available for CVE-2026-23847. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-23847?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Siyuan CVE-2026-23847

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-19 security-advisories@github.com

GHSA-w836-5gpm-7r93

XSS Siyuan Suse

6.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SUSE

MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 30, 2026 - 15:36 vuln.today

Public exploit code

Patch released

Jan 30, 2026 - 15:36 nvd

Patch available

CVE Published

Jan 19, 2026 - 20:15 nvd

MEDIUM 6.1

DescriptionGitHub Advisory

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. The endpoint generates SVG images for text icons (type=8). The content query parameter is inserted directly into the SVG <text> tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript. Version 3.5.4 patches the issue.]

AnalysisAI

Reflected XSS in SiYuan's /api/icon/getDynamicIcon endpoint allows attackers to inject malicious JavaScript through unescaped SVG content in dynamically generated icon images. An unauthenticated attacker can craft a malicious link that, when clicked by a victim, executes arbitrary scripts in the context of the SiYuan application. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.1 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

Threat intelligence, references, and detailed analysis are available after sign-in.

Vendor StatusVendor

SUSE

Severity: Medium

Product	Status
openSUSE Leap 15.6	Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP5	Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP6	Fixed
openSUSE Leap 15.5	Fixed

CVE-2026-23847 vulnerability details – vuln.today

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Siyuan CVE-2026-23847

Severity by source

CVSS VectorGitHub Advisory

Lifecycle Timeline

DescriptionGitHub Advisory

AnalysisAI

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Vulnerability AssessmentAI

Recommended ActionAI

Vendor StatusVendor

SUSE

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External POC / Exploit Code