CVE-2026-7765
User Messages widget leaked issuer messages on shared dashboards
5.3CVSSMEDIUM
Description
Incorrect authorization in the User Messages dashboard widget in Checkmk <2.5.0p5 causes the message-fetching endpoints to return the dashboard creator's messages rather than the viewer's, allowing an attacker who knows a valid public dashboard share token to read the issuer's personal messages by sending requests to the underlying endpoint, even without a User Messages widget present.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:LConfidentialityLow
I:NIntegrityNone
A:NAvailabilityNone
Weaknesses
Affected Products
Attack Graph
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Exploitability
Official Patch Available
MITRE ATT&CK
2 techniques Initial Access
References
Timeline
Published
Jun 8, 2026
Last Updated
Jun 9, 2026
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