CVE-2026-52826 kimai CVE debrief

Who should care

Defenders responsible for Kimai deployments, especially those with editing permissions, should assess exposure and verify the impact of unauthorized rate record pairing on billing configurations.

Why it matters

CVE-2026-52826 allows authenticated users to pair unauthorized rate records with parent objects, impacting billing configurations in Kimai deployments. Defenders should verify exposure, assess impact, and prioritize updates to prevent potential unauthorized access.

• Verification of exposure in Kimai deployments, especially for users with editing permissions.
• Assessment of the impact of unauthorized rate record pairing on billing configurations.
• Prioritization of updates to version 2.57.0 or later to fix the vulnerability.
• Monitoring for suspicious activity related to rate record pairing and billing configuration changes.

Technical summary

CVE-2026-52826 is a vulnerability in Kimai that allows an authenticated user to pair a rate record from an unauthorized project, customer, or activity with a parent object they can edit. This issue persists changes to billing configuration in kimai2_projects_rates, kimai2_customers_rates, or kimai2_activities_rates. The vulnerability is fixed in version 2.57.0. Defenders should prioritize verifying exposure in Kimai deployments, especially for users with editing permissions, and assess the impact of unauthorized rate record pairing on billing configurations.

Defensive priority

Defenders should prioritize verifying exposure in Kimai deployments, especially for users with editing permissions, and assess the impact of unauthorized rate record pairing on billing configurations.

Recommended defensive actions

• Verify Kimai deployments for exposure, especially for users with editing permissions.
• Assess the impact of unauthorized rate record pairing on billing configurations.
• Update to version 2.57.0 or later to fix the vulnerability.
• Monitor for suspicious activity related to rate record pairing and billing configuration changes.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its impact, and the fixed version. However, the scope of affected deployments and the extent of potential unauthorized access require further verification.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.