{"id":"CVE-2026-48911","aliases":["EUVD-2026-53397","GHSA-47mw-vx77-gwvj"],"status":"published","title":"Apache Answer: Unauthenticated OAuth Email-Binding Account Takeover via Existing User Confirmation Flow","description":"Insufficient Verification of Data Authenticity vulnerability in Apache Answer.\n\nThis issue affects Apache Answer: through 2.0.1.\n\nA missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user accounts by tricking victims into clicking a crafted confirmation link.\nUsers are recommended to upgrade to version 2.0.2, which fixes the issue.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00575,"percentile":0.47888,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-306"],"published":"2026-08-05T15:09:14Z","modified":"2026-10-28T02:30:27Z","products":[{"vendor":"apache","product":"answer"},{"vendor":"apache software foundation","product":"apache answer"}],"references":[{"url":"https://lists.apache.org/thread/mrlwtdnhqqgfbchjgq6rffkz67o8wyv8","tags":["vendor-advisory","Mailing List","Vendor Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/08/05/10","tags":["Mailing List","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48911","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-47mw-vx77-gwvj"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48911.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-48911","title":"Apache Answer: Unauthenticated OAuth Email-Binding Account Takeover via Existing User Confirmation Flow","description":"Insufficient Verification of Data Authenticity vulnerability in Apache Answer.\n\nThis issue affects Apache Answer: through 2.0.1.\n\nA missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user accounts by tricking victims into clicking a crafted confirmation link.\nUsers are recommended to upgrade to version 2.0.2, which fixes the issue.","status":"published","published":"2026-08-05T15:09:14.961Z","modified":"2026-08-06T14:37:06.522Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T13:50:49.872037Z"}],"euvd":[{"id":"EUVD-2026-53397","description":"Insufficient Verification of Data Authenticity vulnerability in Apache Answer.\n\nThis issue affects Apache Answer: through 2.0.1.\n\nA missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user accounts by tricking victims into clicking a crafted confirmation link.\nUsers are recommended to upgrade to version 2.0.2, which fixes the issue.","status":"published","published":"2026-08-05T15:09:14Z","modified":"2026-08-06T14:37:06Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T18:02:08.553271Z"}],"ghsa":[{"id":"GHSA-47mw-vx77-gwvj","title":"Insufficient Verification of Data Authenticity vulnerability in Apache Answer.\n\nThis issue...","description":"Insufficient Verification of Data Authenticity vulnerability in Apache Answer.\n\nThis issue affects Apache Answer: through 2.0.1.\n\nA missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user accounts by tricking victims into clicking a crafted confirmation link.\nUsers are recommended to upgrade to version 2.0.2, which fixes the issue.","status":"published","published":"2026-08-05T18:31:35Z","modified":"2026-08-06T15:32:37Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:10:09.171432Z"}],"nvd":[{"id":"CVE-2026-48911","description":"Insufficient Verification of Data Authenticity vulnerability in Apache Answer.\n\nThis issue affects Apache Answer: through 2.0.1.\n\nA missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user accounts by tricking victims into clicking a crafted confirmation link.\nUsers are recommended to upgrade to version 2.0.2, which fixes the issue.","status":"published","published":"2026-08-05T16:16:57.1Z","modified":"2026-10-24T16:10:00.153Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:12:35.031043Z"}],"osv":[{"id":"CVE-2026-48911","title":"Apache Answer: Unauthenticated OAuth Email-Binding Account Takeover via Existing User Confirmation Flow","description":"Insufficient Verification of Data Authenticity vulnerability in Apache Answer.\n\nThis issue affects Apache Answer: through 2.0.1.\n\nA missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user accounts by tricking victims into clicking a crafted confirmation link.\nUsers are recommended to upgrade to version 2.0.2, which fixes the issue.","status":"published","published":"2026-08-05T15:09:14.961Z","modified":"2026-10-28T02:30:27.462941656Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:45:07.060148Z"}]}}