Open redirect in wger - CVE-2026-86256
Published: April 28, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU128289
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-86256
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to redirect a victim's browser to an attacker-controlled site and disclose sensitive information.
The vulnerability exists due to url redirection to an untrusted site in the trainer_login view when handling a crafted ?next= parameter. A remote user can send a crafted link to redirect a victim's browser to an attacker-controlled site and disclose sensitive information.
User interaction is required, and exploitation occurs after the trainer successfully enters impersonation mode.
Affected software
wger
How to mitigate CVE-2026-86256
Install security update from vendor's website.
wger - update to 2.6