CVE-2026-108264 Details
Description
Wizarr is an advanced user invitation and management system for Jellyfin, Plex, Emby, and other media servers. Prior to 2026.9.1, wizard step Markdown supplied through the editor or imported bundles was evaluated by app/blueprints/wizard/routes.py in the application's non-sandboxed Jinja2 environment with application globals exposed. An authenticated user able to create steps, or an administrator importing an untrusted bundle through POST /settings/wizard/import, could execute arbitrary Python when GET /wizard/{server}/{idx} rendered the stored step; app/jinja_filters.py and app/services/wizard_widgets.py contained additional evaluation sinks. This could execute operating-system commands as the application user, disclose the Flask SECRET_KEY, access connected service credentials and the database, and produce stored cross-site scripting. This issue is fixed in 2026.9.1.
A critical server-side template injection vulnerability has been identified in Wizarr, an advanced user invitation and management system for media servers like Jellyfin, Plex, and Emby. This vulnerability exists in versions of Wizarr through 2026.9.0. The issue arises because wizard step Markdown is processed by the application in a non-sandboxed Jinja2 environment, with application globals exposed. An authenticated user who can create steps, or an administrator importing an untrusted bundle, could inject arbitrary Python code. This injected code could be executed on the server, potentially leading to remote code execution, disclosure of the Flask SECRET_KEY, access to connected service credentials, and exploitation of stored cross-site scripting vulnerabilities.
Users can update to Wizarr version 2026.9.1 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 9, 2026CISA-ADP
Assessed Oct 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/wizarrrr/wizarr/security/advisories/GHSA-h9rv-mxh2-35f3 | CISA-ADP | AdvisoryRemedyVendor |
| https://github.com/wizarrrr/wizarr/commit/6aa3c33c1b3d945e055ef116cc531028b3735bb7 | [email protected] | Source CodeVendor |
| https://github.com/wizarrrr/wizarr/releases/tag/v2026.9.1 | [email protected] | Release NotesVendor |
| https://github.com/wizarrrr/wizarr/security/advisories/GHSA-h9rv-mxh2-35f3 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1336 | Improper Neutralization of Special Elements Used in a Template Engine | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Wizarr | <= 2026.9.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 13, 2026 | CVE Modified | CISA-ADP |
| Oct 9, 2026 | New CVE Received | [email protected] |