CVE-2026-7765

EUVD-2026-35051
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 12%
Affected Products (NVD)
VendorProductVersion
checkmkcheckmk
2.5.0
checkmkcheckmk
2.5.0:b1
checkmkcheckmk
2.5.0:b2
checkmkcheckmk
2.5.0:b3
checkmkcheckmk
2.5.0:p1
checkmkcheckmk
2.5.0:p2
checkmkcheckmk
2.5.0:p3
checkmkcheckmk
2.5.0:p4
𝑥
= Vulnerable software versions
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://checkmk.com/werk/19815