CVE-2026-52826Network attack vectorHinoki check available

Cross-scope rate manipulation via missing parent-child validation

Published Sep 15, 2026 · Updated Sep 15, 2026

Improper authorization in Kimai before 2.57.0 allows remote authenticated users to alter billing rates outside their scope. Project, customer, and activity rate-edit controllers resolve parent and rate route parameters independently but never confirm that the rate belongs to that parent. Edit permission on one parent and knowledge of another valid rate ID suffice to persist unauthorized billing changes that distort budgets, revenue reports, and invoices.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authorization in Kimai before 2.57.0 allows remote authenticated users to alter billing rates outside their scope. Project, customer, and activity rate-edit controllers resolve parent and rate route parameters independently but never confirm that the rate belongs to that parent. Edit permission on one parent and knowledge of another valid rate ID suffice to persist unauthorized billing changes that distort budgets, revenue reports, and invoices.

The record

CVE
CVE-2026-52826
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Kimai
Product
Kimai
Classifications
CWE-285, CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.57.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kimai · Kimaiversion=< 2.57.0

Published CVSS scores

4.3GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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