{"id":"CVE-2026-7765","summary":"User Messages widget leaked issuer messages on shared dashboards","details":"Incorrect authorization in the User Messages dashboard widget in Checkmk \u003c2.5.0p5 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.","modified":"2026-07-08T08:11:37.320269948Z","published":"2026-06-08T12:06:02.840Z","database_specific":{"cna_assigner":"Checkmk","unresolved_ranges":[{"extracted_events":[{"introduced":"2.5.0"},{"fixed":"2.5.0p5"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"2.5.0"},{"fixed":"2.5.0p5"}],"source":"CPE_FIELD"}],"cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7765.json"},"references":[{"type":"ADVISORY","url":"https://checkmk.com/werk/19815"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7765.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7765"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/checkmk/checkmk","events":[{"introduced":"a35953b1c7f874fabb2e68f519d4281b0d469a3f"},{"last_affected":"4488bab2392314ec74c09ecde1f09187dcedf2b3"}],"database_specific":{"extracted_events":[{"introduced":"2.5.0-NA"},{"last_affected":"2.5.0-NA"},{"introduced":"2.5.0-b1"},{"last_affected":"2.5.0-b1"},{"introduced":"2.5.0-p1"},{"last_affected":"2.5.0-p1"},{"introduced":"2.5.0-b2"},{"last_affected":"2.5.0-b2"},{"introduced":"2.5.0-p2"},{"last_affected":"2.5.0-p2"},{"introduced":"2.5.0-b3"},{"last_affected":"2.5.0-b3"},{"introduced":"2.5.0-p3"},{"last_affected":"2.5.0-p3"},{"introduced":"2.5.0-p4"},{"last_affected":"2.5.0-p4"}],"source":"CPE_STRING","cpe":["cpe:2.3:a:checkmk:checkmk:2.5.0:-:*:*:*:*:*:*","cpe:2.3:a:checkmk:checkmk:2.5.0:b1:*:*:*:*:*:*","cpe:2.3:a:checkmk:checkmk:2.5.0:p1:*:*:*:*:*:*","cpe:2.3:a:checkmk:checkmk:2.5.0:b2:*:*:*:*:*:*","cpe:2.3:a:checkmk:checkmk:2.5.0:p2:*:*:*:*:*:*","cpe:2.3:a:checkmk:checkmk:2.5.0:b3:*:*:*:*:*:*","cpe:2.3:a:checkmk:checkmk:2.5.0:p3:*:*:*:*:*:*","cpe:2.3:a:checkmk:checkmk:2.5.0:p4:*:*:*:*:*:*"]}}],"versions":["2.5.0-NA","2.5.0-b1","2.5.0-b2","2.5.0-b3","2.5.0-p4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-7765.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}]}