{"id":"CVE-2026-12049","summary":"pgAdmin 4: Open redirect in multi-factor authentication flow via unvalidated 'next' parameter","details":"Open redirect in pgAdmin 4's multi-factor authentication flow. The MFA validate and register endpoints honoured the user-supplied 'next' query/form parameter without confirming the target pointed back inside pgAdmin, so an authenticated victim who clicked /mfa/validate?next=\u003cexternal\u003e -- a link typically delivered by phishing -- would be sent to an attacker-controlled host directly out of the trusted auth flow.\n\nThe defect is a trusted-domain redirect, not a privilege bypass: the attacker gains no read/write access to pgAdmin or the victim's database, but the redirect launders the attacker's destination through pgAdmin's URL, which raises the success rate of credential-phishing follow-on against the victim.\n\nFix introduces a same-origin _is_safe_redirect_url helper and gates every MFA redirect that consumes user-supplied 'next' values through it. The helper allows only relative paths and absolute URLs whose scheme is http(s) and whose host matches the current request host; it rejects external hosts in absolute and protocol-relative form, non-http schemes (javascript:, data:, mailto:), userinfo tricks (http://localhost@attacker/), and backslash variants that some browsers normalize to forward slashes. Unsafe targets fall back to the internal browser index. A dedicated regression test exercises each accept/reject category and the original reporter PoC.\n\nThis issue affects pgAdmin 4: from 6.0 before 9.16.","modified":"2026-07-08T08:12:22.387395598Z","published":"2026-06-18T23:37:43.328Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12049.json","cwe_ids":["CWE-601"],"cna_assigner":"PostgreSQL"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12049.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12049"},{"type":"REPORT","url":"https://github.com/pgadmin-org/pgadmin4/issues/10028"},{"type":"FIX","url":"https://github.com/pgadmin-org/pgadmin4/commit/fff6a481854b07822c2b54e8181e6a9076d204cd"},{"type":"PACKAGE","url":"https://github.com/pgadmin-org/pgadmin4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pgadmin-org/pgadmin4","events":[{"introduced":"a92bad7909458664e3f1c2fef582d2e7dbcc8da2"},{"fixed":"888a053231923e6704b56165cf248db056252144"},{"fixed":"fff6a481854b07822c2b54e8181e6a9076d204cd"}],"database_specific":{"cpe":"cpe:2.3:a:pgadmin:pgadmin_4:*:*:*:*:*:postgresql:*:*","extracted_events":[{"introduced":"6.0"},{"fixed":"9.16"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["REL-9_15","REL-9_14","REL-9_13","REL-9_12","REL-9_11","REL-9_10","REL-9_9","REL-9_8","REL-9_7","REL-9_6","REL-9_5","REL-9_4","REL-9_3","REL-9_2","REL-9_1","REL-9_0","REL-8_14","REL-8_13","REL-8_12","REL-8_11","REL-8_10","REL-8_9","REL-8_8","REL-8_7","REL-8_6","REL-8_5","REL-8_4","REL-8_3","REL-8_2","REL-8_1","REL-8_0","REL-7_8","REL-7_7","REL-7_6","REL-7_5","REL-7_4","REL-7_3","REL-7_2","REL-7_1","REL-7_0","REL-6_21","REL-6_20","REL-6_19","REL-6_18","REL-6_17","REL-6_16","REL-6_15","REL-6_14","REL-6_13","REL-6_12","REL-6_11","REL-6_10","REL-6_9","REL-6_8","REL-6_7","REL-6_6","REL-6_5","REL-6_4","REL-6_3","REL-6_2","REL-6_1","REL-6_0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12049.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}