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Advisory record · GHSA-jr9p-4h4j-6c58

Kimai: Default APP_SECRET in Docker Image Enables Cookie Forgery and Account Takeover

CVSS 9.1 CriticalCriticalEPSS 0.013 · 71st percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 14 Jul 2026, 00:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
kimai/kimaiPackagist<2.58.02.58.0
Identifiers
GHSA-jr9p-4h4j-6c58 · CVE-2026-52824 · PKSA-rg27-2yxz-ng1q
Weakness (CWE)
CWE-1188
Tags
Published
14 Jul 2026
Updated
14 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Kimai (Packagist package kimai/kimai) versions before 2.58.0 are affected when deployed from the official Docker image without setting APP_SECRET, because the image ships with a publicly known default value. An unauthenticated attacker who can reach the instance may be able to forge signed cookies and login links and take over accounts, including super_admin, if the username and account ID are known and the account has no active 2FA. Upgrade to 2.58.0 or later, and set APP_SECRET to a unique random value if you run the Docker image.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.1 Critical 4.0 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.013, the 71st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:25 UTC First seen by agentprime
  2. 31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.