CVE-2026-80200 Kimai before 2.53.0 Open Redirect via RelayState
Attackers with IdP access can redirect authenticated Kimai users to malicious sites via unvalidated RelayState parameters, enabling phishing or credential theft.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-80200?
CVE-2026-80200 is a medium-severity vulnerability in kimai, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Kimai before 2.53.0 contains an open redirect vulnerability in the SAML authentication success handler that accepts unvalidated RelayState POST parameters as redirect destinations. Attackers with IdP access can supply malicious RelayState values to redirect authenticated users to attacker-controlled URLs for credential theft or phishing attacks.
Weakness: CWE-601
Which versions are affected by CVE-2026-80200?
2 open source packages ship an affected version, including kimai/kimai.
| Package | Affected | Fixed in |
|---|---|---|
kimai/kimai Packagist | All versions | 2.53.0 |
kimai/kimai Packagist | All versions | 2.53.0 |
How do I fix CVE-2026-80200?
Upgrade kimai/kimai to 2.53.0 or later.
Is CVE-2026-80200 being exploited?
There is no known exploitation of CVE-2026-80200 in the wild and no public exploit code.
Sources
Also known as GHSA-3jp4-mhh4-gcgr, GHSA-wv9h-9jv8-rqm9.