CVE-2026-80200: Kimai has an Open Redirect via Unvalidated RelayState in SAML ACS Handler

low Affects kimai/kimai. Feed 2026.10.29.1, updated 2026-10-28; published 2026-04-14; advisory modified 2026-08-27.

Kimai has an Open Redirect via Unvalidated RelayState in SAML ACS Handler

Package: kimai/kimai Composer
Affected versions: <2.53.0
Fixed in: 2.53.0
Severity: low
Exploitation: not on CISA KEV · EPSS 0% (29.7th percentile)
Published: 2026-04-14
Source: osv.dev

References

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2023-46245 high Kimai (Authenticated) SSTI to RCE by Uploading a Malicious Twig File same package: kimai/kimai
CVE-2026-52824 critical Kimai: Default APP_SECRET in Docker Image Enables Cookie Forgery and Account Takeover same package: kimai/kimai
CVE-2024-4596 low Kimai information disclosure vulnerability same package: kimai/kimai
CVE-2020-19825 critical Cross-site Scripting in kimai/kimai same package: kimai/kimai
CVE-2024-29200 medium Kimai API returns timesheet entries a user should not be authorized to view same package: kimai/kimai
CVE-2023-53957 critical Kimai contains a SameSite cookie vulnerability same package: kimai/kimai