Cross-site scripting in wger - CVE-2026-40353
Published: April 20, 2026
Vulnerability identifier: #VU126594
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-40353
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: wger Project
Affected software:
wger
wger
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary script in a victim's browser.
The vulnerability exists due to cross-site scripting in the AbstractLicenseModel.attribution_link property and ingredient view template when rendering user-controlled license attribution fields. A remote user can create an ingredient with a specially crafted license_author value to execute arbitrary script in a victim's browser.
The malicious content is stored in the database and is triggered when any user, including unauthenticated visitors, views the public ingredient page.
How to mitigate CVE-2026-40353
Install security update from vendor's website.