{"id":"UBUNTU-CVE-2026-5266","details":"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.","modified":"2026-05-27T10:16:58.400097836Z","published":"2026-05-11T18:16:00Z","upstream":["CVE-2026-5266"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-5266"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-5266"},{"type":"REPORT","url":"http://phabricator.wikimedia.org/T420154"},{"type":"REPORT","url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Echo/+/1265622"},{"type":"REPORT","url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Echo/+/1265608"},{"type":"REPORT","url":"https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/DIBLSBHISKX6NFRUFNOGZRVW42E7R2QP/"}],"affected":[{"package":{"name":"mediawiki","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=bionic"},"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"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.27.4-3","binary_name":"mediawiki"},{"binary_name":"mediawiki-classes","binary_version":"1:1.27.4-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5266.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps%2Ffocal"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.31.7-1ubuntu0.1~esm1"},{"binary_version":"1:1.31.7-1ubuntu0.1~esm1","binary_name":"mediawiki-classes"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5266.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps%2Fjammy"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.35.6-1ubuntu0.1~esm1"},{"binary_version":"1:1.35.6-1ubuntu0.1~esm1","binary_name":"mediawiki-classes"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5266.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=esm-apps%2Fnoble"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.39.7-1ubuntu0.1~esm1"},{"binary_version":"1:1.39.7-1ubuntu0.1~esm1","binary_name":"mediawiki-classes"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5266.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=questing"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.43.3+dfsg-1"},{"binary_version":"1:1.43.3+dfsg-1","binary_name":"mediawiki-classes"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5266.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=resolute"},"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"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.43.8+dfsg-2","binary_name":"mediawiki"},{"binary_name":"mediawiki-classes","binary_version":"1:1.43.8+dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5266.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"},{"type":"Ubuntu","score":"medium"}]}