Is CVE-2026-52828 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-52828 being exploited in the wild.

How severe is CVE-2026-52828?

Medium severity, with a CVSS score of 4, published 15 September 2026.

Which products and versions are affected?

Kimai <= 2.57.0; kimai/kimai (Packagist) <= 2.57.0, ECOSYSTEM:introduced=0,fixed=2.58.0.

Is there a fix for CVE-2026-52828?

Yes. kimai/kimai (Packagist): upgrade to 2.58.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-52828 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-52828?

Check whether you run Kimai or kimai/kimai (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-52828: Kimai missing authorization check in ExportController export templates

Q: Which products and versions are affected?

Kimai <= 2.57.0; kimai/kimai (Packagist) <= 2.57.0, ECOSYSTEM:introduced=0,fixed=2.58.0.

Q: Is there a fix for CVE-2026-52828?

Yes. kimai/kimai (Packagist): upgrade to 2.58.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-52828 attacked?

It is attacked over the network, in a web application.

Q: Am I affected by CVE-2026-52828?

Check whether you run Kimai or kimai/kimai (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-52828 · Severity: medium · CVSS 4 · Published 2026-09-15

Kimai is an open-source time-tracking application. A security flaw was found where users with 'Teamlead' privileges can create or modify global export templates, a task normally restricted to administrators. This allows unauthorized users to change how data is formatted and presented for all users in the system, potentially affecting data integrity and reporting.

Technologies: Kimai, kimai/kimai (Packagist). Vendors: Kimai, Packagist.

Quick answers

Is CVE-2026-52828 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-52828 being exploited in the wild.
How severe is CVE-2026-52828?: Medium severity, with a CVSS score of 4, published 15 September 2026.
Which products and versions are affected?: Kimai <= 2.57.0; kimai/kimai (Packagist) <= 2.57.0, ECOSYSTEM:introduced=0,fixed=2.58.0.
Is there a fix for CVE-2026-52828?: Yes. kimai/kimai (Packagist): upgrade to 2.58.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-52828 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-52828?: Check whether you run Kimai or kimai/kimai (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

kimai/kimai (Packagist): upgrade to 2.58.0 or later
```
composer require kimai/kimai:^2.58.0
```

Technical details

A missing authorization check (CWE-862) exists in the Kimai ExportController. While the API and UI correctly enforce the 'create_export_template' permission (restricted to ROLE_ADMIN), the web controller routes for 'createExportTemplate' and 'editExportTemplate' only check for the broader 'create_export' permission, which is granted to ROLE_TEAMLEAD by default. Because ExportTemplate entities are global and lack per-user scoping, a TEAMLEAD can modify templates used by all users, including administrators. This vulnerability is addressed in version 2.58.0 by adding the appropriate #[IsGranted('create_export_template')] annotations.

Affected products

Kimai Kimai <= 2.57.0

Identifiers

CVE-2026-52828
GHSA-rw46-qg69-vg6h

Timeline

2026-06-11: disclosed: Advisory published to GitHub by reporter
2026-07-14: advisory: Published to GitHub Advisory Database

References

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