Vulnerability in Kimai
CVE-2026-23626
Kimai is a web-based multi-user time-tracking application. Prior to version 2.46.0, Kimai's export functionality uses a Twig sandbox with an overly permissive security policy (`DefaultPolicy`) that allows arbitrary method calls on objects available in the template context. An authenticated user with export permissions can deploy a malicious Twig template that extracts sensitive information including environment variables, all user password hashes, serialized session tokens, and CSRF tokens. Version 2.46.0 patches this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (39.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Kimai — versions < 2.46.0
Weakness classification (CWE)
References
- github.com/kimai/kimai/security/advisories/GHSA-jg2j-2w24-54cg (Exploit, Mitigation, Vendor Advisory)
- github.com/kimai/kimai/pull/5757 (Issue Tracking)
- github.com/kimai/kimai/commit/6a86afb5fd79f6c1825060b87c09bd1909c2e86f (Patch)
- github.com/kimai/kimai/releases/tag/2.46.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-23626?
- CVE-2026-23626 is a medium-severity vulnerability in Kimai, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 6.8/10. Published 2026-01-18.
- How severe is CVE-2026-23626?
- Medium severity. CVSS v3 base score is 6.8 out of 10.