Description
OpenCATS before 0.10.0 contains a missing authorization vulnerability in CalendarUI::onEditEvent() and onDeleteEvent() that allows authenticated users to modify or delete other users' calendar events. Attackers with EDIT or DELETE access can supply arbitrary eventID values to alter or remove any user's events, including non-public ones restricted to their owner.
Published: 2026-10-20
Score: 5.3 Medium
EPSS: n/a
KEV: No
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Remediation

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History

Tue, 20 Oct 2026 12:45:00 +0000

Type Values Removed Values Added
Description OpenCATS before 0.10.0 contains a missing authorization vulnerability in CalendarUI::onEditEvent() and onDeleteEvent() that allows authenticated users to modify or delete other users' calendar events. Attackers with EDIT or DELETE access can supply arbitrary eventID values to alter or remove any user's events, including non-public ones restricted to their owner.
Title OpenCATS before 0.10.0 Missing Authorization in Calendar editEvent/deleteEvent
First Time appeared Opencats
Opencats opencats
Weaknesses CWE-639
CPEs cpe:2.3:a:opencats:opencats:*:*:*:*:*:*:*:*
Vendors & Products Opencats
Opencats opencats
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Opencats Opencats
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-20T10:41:36.105Z

Reserved: 2026-10-20T01:07:44.982Z

Link: CVE-2026-113349

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-20T11:17:19.010

Modified: 2026-10-20T11:17:19.143

Link: CVE-2026-113349

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-639

    Authorization Bypass Through User-Controlled Key