Authorization bypass through user-controlled key in HedgeDoc - #VU165821
Published: November 11, 2026
Vulnerability identifier: #VU165821
CSH Severity: Low
CVSS v4: 7.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to take over another user's account.
The vulnerability exists due to authorization bypass through a user-controlled key in HedgeDoc's external identity-provider login handling when looking up accounts using the profileid database column without identifying the issuing provider. A remote user can log in through a second trusted identity provider using an ID matching another user's stored profile ID to take over that user's account.
Affected software
HedgeDoc
Remediation
Install security update from vendor's website.
HedgeDoc - update to 1.12.1