23 Oct 2026 15:48:27 UTC
Kimai: Default APP_SECRET in Docker Image Enables Cookie Forgery and Account Takeover
cve-program · CVE-2026-52824 · Published
CVE-2026-52824
Kimai: Default APP_SECRET in Docker Image Enables Cookie Forgery and Account Takeover
CVSS 4.0 9.1 CRITICALCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-52824
PublishedKimai is an open-source time tracking application. Prior to 2.58.0, the official Docker image sets APP_SECRET to the public value change_this_to_something_unique in Dockerfile, and .docker/entrypoint.sh neither replaces nor rejects that value before Symfony uses it as kernel.secret. An unauthenticated attacker who reaches a deployment that did not override APP_SECRET, knows a username, correctly guesses the account ID associated with that username, and targets an account without active two-factor authentication can forge HMAC-protected authentication artifacts, including KIMAI_REMEMBER cookies and login links, to access the account without its password. The updated entrypoint generates and persists a random secret when no safe operator-provided value exists. This issue is fixed in version 2.58.0.
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