Improper Authentication in Tolgee - #VU166058
Published: November 12, 2026
Vulnerability identifier: #VU166058
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to persistently deny legitimate email owners access to accounts registered using their email addresses.
The vulnerability exists due to improper authentication in Tolgee's two-factor authentication and account recovery workflows when enabling two-factor authentication without verifying email ownership and retaining it after password resets. A remote attacker can register with a victim's email address and configure attacker-controlled two-factor authentication to prevent the victim from recovering account access even after email verification and password resets.
Affected software
Tolgee
Remediation
Install security update from vendor's website.
Tolgee - update to 3.242.5