{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "9.0"
              },
              {
                "fixed": "9.23"
              },
              {
                "introduced": "10.0"
              },
              {
                "fixed": "10.11"
              },
              {
                "introduced": "11.0"
              },
              {
                "fixed": "11.4"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "fde780b71853eddee7c2efc409b2f82335475cb7"
            },
            {
              "fixed": "74b0c25cce5238b4a7414b84b3308165e0afa334"
            },
            {
              "introduced": "cf8158610d18ee0277ee743de16b79d09bcf7af6"
            },
            {
              "fixed": "2a3758ee3b01e5c66922e08f58a2189146b884d4"
            },
            {
              "introduced": "2151d66e5092fc346bf0bacb49ab7edb468596b3"
            },
            {
              "fixed": "6900ae43472a3f5042a7547035c1a456a80b76ed"
            }
          ],
          "repo": "https://github.com/ilias-elearning/ilias",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86416.json"
  },
  "details": "ILIAS versions before 9.23, 10.11, and 11.4 contain an authorization bypass vulnerability in ilObjGroupGUI where saveMapSettingsObject() and updateGroupTypeObject() perform state-changing operations without write permission checks. Authenticated users with only read access to a group can craft POST requests to modify group map settings and didactic template assignments, changing group modes and permissions for all members.",
  "id": "CVE-2026-86416",
  "modified": "2026-09-10T03:30:31.660108481Z",
  "published": "2026-09-07T12:23:54.710Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://docu.ilias.de/ilias.php?baseClass=ilrepositorygui\u0026cmdNode=wy:ll:6t\u0026cmdClass=ilBlogPostingGUI\u0026cmd=previewFullscreen\u0026ref_id=15821\u0026blpg=940"
    },
    {
      "type": "ADVISORY",
      "url": "https://docu.ilias.de/ilias.php?baseClass=ilrepositorygui\u0026cmdNode=wy:ll:6t\u0026cmdClass=ilBlogPostingGUI\u0026cmd=previewFullscreen\u0026ref_id=15821\u0026blpg=941"
    },
    {
      "type": "ADVISORY",
      "url": "https://docu.ilias.de/ilias.php?baseClass=ilrepositorygui\u0026cmdNode=wy:ll:6t\u0026cmdClass=ilBlogPostingGUI\u0026cmd=previewFullscreen\u0026ref_id=15821\u0026blpg=942"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86416.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86416"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/ilias-before-9.23-10.11-and-11.4-missing-authorization-in-group-object-action-methods"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ILIAS-eLearning/ILIAS/commit/16bca712847f83440fa051cdbb15b38296357c79"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ILIAS-eLearning/ILIAS"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/ILIAS-eLearning/ILIAS/blob/v11.3/components/ILIAS/Group/classes/class.ilObjGroupGUI.php#L560-L569"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/ILIAS-eLearning/ILIAS/blob/v11.3/components/ILIAS/Group/classes/class.ilObjGroupGUI.php#L830-L858"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "ILIAS before 9.23, 10.11, and 11.4 Missing Authorization in Group Object Action Methods"
}