CVE-2026-52824

Kimai 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.

• CWE-1188

• https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601
• https://github.com/kimai/kimai/pull/5952
• https://github.com/kimai/kimai/releases/tag/2.58.0
• https://github.com/kimai/kimai/security/advisories/GHSA-jr9p-4h4j-6c58
• https://www.kimai.org/en/security/ghsa-jr9p-4h4j-6c58

Published

Sep 15, 2026

Last Modified

Sep 16, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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