{"id":"UBUNTU-CVE-2026-34087","details":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation OATHAuth. This issue affects OATHAuth: from * before 1.43.7, 1.44.4, 1.45.2.","modified":"2026-05-27T10:15:50.958997871Z","published":"2026-05-11T16:17:00Z","upstream":["CVE-2026-34087"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-34087"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-34087"},{"type":"REPORT","url":"https://phabricator.wikimedia.org/T412061"},{"type":"REPORT","url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/OATHAuth/+/1265614"},{"type":"REPORT","url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/OATHAuth/+/1265610"},{"type":"REPORT","url":"https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/DIBLSBHISKX6NFRUFNOGZRVW42E7R2QP/"}],"affected":[{"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"},{"fixed":"1:1.35.6-1ubuntu0.1~esm1"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.35.6-1ubuntu0.1~esm1"},{"binary_name":"mediawiki-classes","binary_version":"1:1.35.6-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34087.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"},{"fixed":"1:1.39.7-1ubuntu0.1~esm1"}]}],"versions":["1:1.39.4-2","1:1.39.5-1","1:1.39.6-1","1:1.39.7-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"mediawiki","binary_version":"1:1.39.7-1ubuntu0.1~esm1"},{"binary_name":"mediawiki-classes","binary_version":"1:1.39.7-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34087.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_version":"1:1.43.3+dfsg-1","binary_name":"mediawiki"},{"binary_name":"mediawiki-classes","binary_version":"1:1.43.3+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34087.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/mediawiki?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.43.8+dfsg-2"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.43.8+dfsg-2"},{"binary_name":"mediawiki-classes","binary_version":"1:1.43.8+dfsg-2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34087.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/S:N/AU:Y/R:A/RE:M"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}