What is the CVSS score of CVE-2026-27616?

CVE-2026-27616 has a CVSS 3.1 base score of 7.3 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.0%.

Which versions of Vikunja are affected by CVE-2026-27616?

Vikunja task management instances prior to version 2.0.0 contain a vulnerability allowing malicious SVG file uploads that could lead to unauthorized access or system compromise.

Is there a public PoC exploit available for CVE-2026-27616?

Yes, a public proof-of-concept exploit is available for CVE-2026-27616. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-27616?

Within 24 hours: Disable SVG file uploads in Vikunja or restrict upload functionality to administrators only; review recent file uploads and user activity logs for suspicious SVG files. Within 7 days: Evaluate feasibility of upgrading to version 2.0.0 or later, or implement WAF rules to block SVG uploads at the perimeter. Within 30 days: Complete migration to patched version or deploy alternative task management solution if patching is not feasible.

Vikunja CVE-2026-27616

HIGH

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

2026-02-25 security-advisories@github.com

GHSA-7jp5-298q-jg98

XSS File Upload Vikunja Suse

7.3

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.3 HIGH

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

SUSE

HIGH

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Mar 05, 2026 - 16:35 vuln.today

Public exploit code

CVE Published

Feb 25, 2026 - 22:16 nvd

HIGH 7.3

DescriptionGitHub Advisory

Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the application allows users to upload SVG files as task attachments. SVG is an XML-based format that supports JavaScript execution through elements such as <script> tags or event handlers like onload. The application does not sanitize SVG content before storing it. When the uploaded SVG file is accessed via its direct URL, it is rendered inline in the browser under the application's origin. As a result, embedded JavaScript executes in the context of the authenticated user. Because the authentication token is stored in localStorage, it is accessible via JavaScript and can be retrieved by a malicious payload. Version 2.0.0 patches this issue.

AnalysisAI

Stored cross-site scripting (XSS) in Vikunja prior to version 2.0.0 allows authenticated attackers to steal authentication tokens by uploading malicious SVG files containing JavaScript that executes when accessed directly. The vulnerability exists because the application fails to sanitize SVG content before storage and renders it inline under the application origin, enabling token theft from localStorage. Public exploit code exists for this vulnerability and no patch is currently available for affected versions.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Vikunja. Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the application allows users to upload SVG files as task attachments. SVG is an XML-based format that supports JavaScript execution through elements such as <script> tags or event handlers like onload. The application does not sanitize SVG content before storing it. When the uploaded SVG file is accessed via its direct URL, it is rendered inline in the browser under the application's origin. As a result, embe

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.