What is the CVSS score of CVE-2026-28685?

CVE-2026-28685 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Kimai are affected by CVE-2026-28685?

Organizations using Kimai should be aware of notable risk from CVE-2026-28685 rated CVSS 6.5. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-28685?

Yes, a public proof-of-concept exploit is available for CVE-2026-28685. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-28685?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Kimai CVE-2026-28685

MEDIUM

Improper Authorization (CWE-285)

2026-03-06 security-advisories@github.com

GHSA-v33r-r6h2-8wr7

Authentication Bypass Kimai

6.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

PoC Detected

Mar 10, 2026 - 19:52 vuln.today

Public exploit code

Patch released

Mar 10, 2026 - 19:52 nvd

Patch available

CVE Published

Mar 06, 2026 - 05:16 nvd

MEDIUM 6.5

DescriptionGitHub Advisory

Kimai is a web-based multi-user time-tracking application. Prior to version 2.51.0, "GET /api/invoices/{id}" only checks the role-based view_invoice permission but does not verify the requesting user has access to the invoice's customer. Any user with ROLE_TEAMLEAD (which grants view_invoice) can read all invoices in the system, including those belonging to customers assigned to other teams. This issue has been patched in version 2.51.0.

AnalysisAI

Kimai versions prior to 2.51.0 lack proper customer-level access controls in the invoice API endpoint, allowing any user with the TEAMLEAD role to enumerate and read all invoices across the entire system regardless of customer ownership. Public exploit code exists for this authorization bypass vulnerability, which can lead to unauthorized disclosure of sensitive financial and customer data. A patch is available in version 2.51.0 and should be applied immediately.

Technical ContextAI

Classified as CWE-285 (Improper Authorization). Affects Kimai. Kimai is a web-based multi-user time-tracking application. Prior to version 2.51.0, "GET /api/invoices/{id}" only checks the role-based view_invoice permission but does not verify the requesting user has access to the invoice's customer. Any user with ROLE_TEAMLEAD (which grants view_invoice) can read all invoices in the system, including those belonging to customers assigned to other teams. This issue has been patched in version 2.51.0.