{"id":"CVE-2026-41128","state":"PUBLISHED","title":"Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action","description":"Craft CMS is a content management system (CMS). In versions 5.6.0 through 5.9.14, the `actionSavePermissions()` endpoint allows a user with only `viewUsers` permission to remove arbitrary users from all user groups. While `_saveUserGroups()` enforces per-group authorization for additions, it performs no equivalent authorization check for removals, so submitting an empty `groups` value removes all existing group memberships. Version 5.9.15 contains a patch.","publishedAt":"2026-04-21T23:32:37.911Z","updatedAt":"2026-04-22T18:13:34.270Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["craftcms cms"],"affected":[{"vendor":"craftcms","product":"cms","versions":[{"version":">= 5.6.0, < 5.9.15","status":"affected"}]}],"references":["https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3","https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41128.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41128","state":"PUBLISHED","datePublished":"2026-04-21T23:32:37.911Z","dateUpdated":"2026-04-22T18:13:34.270Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-17T12:59:15.737Z"},"containers":{"cna":{"title":"Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action","descriptions":[{"lang":"en","value":"Craft CMS is a content management system (CMS). In versions 5.6.0 through 5.9.14, the `actionSavePermissions()` endpoint allows a user with only `viewUsers` permission to remove arbitrary users from all user groups. While `_saveUserGroups()` enforces per-group authorization for additions, it performs no equivalent authorization check for removals, so submitting an empty `groups` value removes all existing group memberships. Version 5.9.15 contains a patch."}],"affected":[{"vendor":"craftcms","product":"cms","versions":[{"version":">= 5.6.0, < 5.9.15","status":"affected"}]}],"references":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3","name":"https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27","name":"https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-21T23:32:37.911Z"},"source":{"advisory":"GHSA-jq2f-59pj-p3m3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-22T18:13:25.942876Z","id":"CVE-2026-41128","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-22T18:13:34.270Z"}}]}}}