{"id":"CVE-2026-28512","summary":"Pocket ID: OAuth redirect_uri validation bypass via userinfo/host confusion","details":"Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. From 2.0.0 to before 2.4.0, a flaw in callback URL validation allowed crafted redirect_uri values containing URL userinfo (@) to bypass legitimate callback pattern checks. If an attacker can trick a user into opening a malicious authorization link, the authorization code may be redirected to an attacker-controlled host. This vulnerability is fixed in 2.4.0.","aliases":["GHSA-9h33-g3ww-mqff","GO-2026-4653"],"modified":"2026-04-02T13:22:22.140478Z","published":"2026-03-09T22:17:58.425Z","related":["SUSE-SU-2026:1042-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28512.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-601"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28512.json"},{"type":"ADVISORY","url":"https://github.com/pocket-id/pocket-id/security/advisories/GHSA-9h33-g3ww-mqff"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28512"},{"type":"FIX","url":"https://github.com/pocket-id/pocket-id/commit/3a339e33191c31b68bf57db907f800d9de5ffbc8"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pocket-id/pocket-id","events":[{"introduced":"f5e2c68ba3f2fd7112d0e0334f41abdfce74e7d7"},{"fixed":"b59e35cb59ae52b66b072639382d98812b268488"}]}],"versions":["v2.0.0","v2.0.1","v2.0.2","v2.1.0","v2.2.0","v2.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28512.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N"}]}