CVE-2026-80197Network attack vectorHinoki check available

Cross-user bookmark tampering via missing ownership check

Published Aug 25, 2026 · Updated Aug 25, 2026

Improper authorization in Kimai before 2.57.0 allows remote authenticated users to alter another user's favorite timesheet bookmarks. FavoriteController passes a user-selected Timesheet to FavoriteRecordService without an is_owner check, and the service derives the bookmark owner from that timesheet. The caller needs start_own_timesheet permission and the victim's numeric timesheet ID; impact is limited to the favorite/recent list.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
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 another user's favorite timesheet bookmarks. FavoriteController passes a user-selected Timesheet to FavoriteRecordService without an is_owner check, and the service derives the bookmark owner from that timesheet. The caller needs start_own_timesheet permission and the victim's numeric timesheet ID; impact is limited to the favorite/recent list.

The record

CVE
CVE-2026-80197
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Kimai
Product
Kimai
Classifications
CWE-639, CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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=0 <2.57.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kimai · Kimaiversion=0 <2.57.0

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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-639Authorization Bypass Through User-Controlled Key
CWE-862Missing Authorization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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