{"id":"CVE-2026-55834","state":"PUBLISHED","title":"Pocket ID: Open Redirect on the OIDC /authorize page via unvalidated redirect_uri with prompt=none","description":"Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 2.6.0 until 2.9.0, frontend/src/routes/authorize/+page.ts reads the redirect_uri query parameter and frontend/src/routes/authorize/+page.svelte uses the raw callbackURL in redirectWithError when prompt=none cannot complete silent authorization. The client-side path only blocks javascript and data schemes and does not invoke the backend callback allow-list validation, so an unauthenticated attacker who knows a valid client_id can redirect a victim browser to an arbitrary HTTP or HTTPS origin for phishing or OIDC error and state smuggling. This issue is fixed in version 2.9.0.","publishedAt":"2026-08-28T16:27:58.324Z","updatedAt":"2026-08-28T20:28:38.924Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["pocket-id pocket-id"],"affected":[{"vendor":"pocket-id","product":"pocket-id","versions":[{"version":">= 2.6.0, < 2.9.0","status":"affected"}]}],"references":["https://github.com/pocket-id/pocket-id/security/advisories/GHSA-2wvm-8mvp-22qv","https://github.com/pocket-id/pocket-id/commit/8a7577497131229badb35cb4b3a4227b1300afff","https://github.com/pocket-id/pocket-id/releases/tag/v2.9.0"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55834.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55834","state":"PUBLISHED","datePublished":"2026-08-28T16:27:58.324Z","dateUpdated":"2026-08-28T20:28:38.924Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-17T16:29:38.865Z"},"containers":{"cna":{"title":"Pocket ID: Open Redirect on the OIDC /authorize page via unvalidated redirect_uri with prompt=none","descriptions":[{"lang":"en","value":"Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 2.6.0 until 2.9.0, frontend/src/routes/authorize/+page.ts reads the redirect_uri query parameter and frontend/src/routes/authorize/+page.svelte uses the raw callbackURL in redirectWithError when prompt=none cannot complete silent authorization. The client-side path only blocks javascript and data schemes and does not invoke the backend callback allow-list validation, so an unauthenticated attacker who knows a valid client_id can redirect a victim browser to an arbitrary HTTP or HTTPS origin for phishing or OIDC error and state smuggling. This issue is fixed in version 2.9.0."}],"affected":[{"vendor":"pocket-id","product":"pocket-id","versions":[{"version":">= 2.6.0, < 2.9.0","status":"affected"}]}],"references":[{"url":"https://github.com/pocket-id/pocket-id/security/advisories/GHSA-2wvm-8mvp-22qv","name":"https://github.com/pocket-id/pocket-id/security/advisories/GHSA-2wvm-8mvp-22qv","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/pocket-id/pocket-id/commit/8a7577497131229badb35cb4b3a4227b1300afff","name":"https://github.com/pocket-id/pocket-id/commit/8a7577497131229badb35cb4b3a4227b1300afff","tags":["x_refsource_MISC"]},{"url":"https://github.com/pocket-id/pocket-id/releases/tag/v2.9.0","name":"https://github.com/pocket-id/pocket-id/releases/tag/v2.9.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-28T16:27:58.324Z"},"source":{"advisory":"GHSA-2wvm-8mvp-22qv","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/pocket-id/pocket-id/security/advisories/GHSA-2wvm-8mvp-22qv","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T20:27:55.433241Z","id":"CVE-2026-55834","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-28T20:28:38.924Z"}}]}}}