{"id":"CVE-2026-5266","aliases":["DEBIAN-CVE-2026-5266","EUVD-2026-29157","GHSA-vmww-wfjj-w6p8","UBUNTU-CVE-2026-5266"],"status":"published","title":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation...","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo.\n\n This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php.\n\n\n\nThis issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.","severity":{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00247,"percentile":0.1609,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2026-05-11T16:55:55Z","modified":"2026-10-26T11:47:35Z","fixes":[{"ecosystem":"Debian:13","package":"mediawiki","fixed_in":["1:1.43.8+dfsg-1~deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"mediawiki","fixed_in":["1:1.43.8+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.43.8+dfsg-1~deb13u1"}]}],"versions":["1:1.43.3+dfsg-1","1:1.43.5+dfsg-1","1:1.43.6+dfsg-1","1:1.43.6+dfsg-1~deb13u1","1:1.43.6+dfsg-2"]},{"source":"osv","ecosystem":"Debian:14","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.43.8+dfsg-1"}]}],"versions":["1:1.43.3+dfsg-1","1:1.43.5+dfsg-1","1:1.43.6+dfsg-1","1:1.43.6+dfsg-1~deb13u1","1:1.43.6+dfsg-2","1:1.43.8+dfsg-1~deb13u1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.27.3-1","1:1.27.4-1","1:1.27.4-2","1:1.27.4-3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.31.2-1ubuntu1","1:1.31.5-1","1:1.31.5-1ubuntu1","1:1.31.5-2","1:1.31.5-3","1:1.31.5-3ubuntu1","1:1.31.6-1","1:1.31.7-1","1:1.31.7-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.35.3-1","1:1.35.4-1","1:1.35.5-1","1:1.35.5-1ubuntu1","1:1.35.5-1ubuntu2","1:1.35.5-1ubuntu3","1:1.35.6-1","1:1.35.6-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.39.4-2","1:1.39.5-1","1:1.39.6-1","1:1.39.7-1","1:1.39.7-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.43.1+dfsg-1","1:1.43.1+dfsg-2","1:1.43.3+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.43.8+dfsg-2","1:1.43.9+dfsg-1","1:1.43.9+dfsg-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"mediawiki","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.43.3+dfsg-1","1:1.43.5+dfsg-1","1:1.43.6+dfsg-2","1:1.43.8+dfsg-1","1:1.43.8+dfsg-2"]}],"products":[{"vendor":"wikimedia foundation","product":"echo"}],"references":[{"url":"https://phabricator.wikimedia.org/T420154"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5266"},{"url":"https://github.com/advisories/GHSA-vmww-wfjj-w6p8"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-5266","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-5266","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5266","tags":["report"]},{"url":"http://phabricator.wikimedia.org/T420154","tags":["report"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Echo/+/1265622","tags":["report"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Echo/+/1265608","tags":["report"]},{"url":"https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/DIBLSBHISKX6NFRUFNOGZRVW42E7R2QP/","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-5266","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo.\n\n This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php.\n\n\n\nThis issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.","status":"published","published":"2026-05-11T16:55:55.171Z","modified":"2026-05-11T18:00:17.517Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"low","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T13:39:27.849196Z"}],"euvd":[{"id":"EUVD-2026-29157","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo.\n\n This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php.\n\n\n\nThis issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.","status":"published","published":"2026-05-11T16:55:55Z","modified":"2026-05-11T18:00:17Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"low"}],"updated_at":"2026-11-02T19:05:10.736891Z"}],"ghsa":[{"id":"GHSA-vmww-wfjj-w6p8","title":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation...","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo.\n\n This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php.\n\n\n\nThis issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.","status":"published","published":"2026-05-11T18:31:47Z","modified":"2026-05-11T18:31:59Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:07:59.393178Z"}],"nvd":[{"id":"CVE-2026-5266","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo.\n\n This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php.\n\n\n\nThis issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.","status":"published","published":"2026-05-11T18:16:42.033Z","modified":"2026-10-26T00:10:00.15Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low","assessor":"secondary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:12:18.239974Z"}],"osv":[{"id":"DEBIAN-CVE-2026-5266","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo.   This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php.    This issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.","status":"published","published":"2026-05-11T18:16:42.033Z","modified":"2026-10-26T11:47:35.448398354Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low"}],"updated_at":"2026-11-02T15:45:56.877408Z"},{"id":"UBUNTU-CVE-2026-5266","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo.  This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php. This issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.","status":"published","published":"2026-05-11T18:16:00Z","modified":"2026-10-17T12:58:34.161075921Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","level":"low"}],"updated_at":"2026-11-02T16:56:33.391918Z"}]}}