{"id":"CVE-2026-40300","summary":"Zulip: Message edit history visible in \"moves only\" policy through /api/v1/messages/{id}/history","details":"Zulip is an open-source team collaboration tool. Prior to 12.0, With message_edit_history_visibility_policy set to \"moves\", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages. This vulnerability is fixed in 12.0.","aliases":["GHSA-jp8f-mvv6-89cr"],"modified":"2026-08-12T03:51:29.152562181Z","published":"2026-05-12T16:33:02.829Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-284"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40300.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40300.json"},{"type":"ADVISORY","url":"https://github.com/zulip/zulip/security/advisories/GHSA-jp8f-mvv6-89cr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40300"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zulip/zulip","events":[{"introduced":"df1abeb8ed5f51d6e93114385ec637af9325962f"},{"fixed":"66114d404aeda6f3da1267469f3a5347acc8263a"}],"database_specific":{"cpe":"cpe:2.3:a:zulip:zulip_server:10.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"12.0"},{"introduced":"10.0"},{"last_affected":"10.0"}],"source":["AFFECTED_FIELD","CPE_STRING"]}}],"versions":["10.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40300.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}