{"id":"CVE-2026-63771","summary":"Adminer \u003c 5.4.3 Cookie Injection via X-Forwarded-Prefix Header","details":"Adminer before 5.4.3 contains a cookie injection vulnerability that allows attackers to manipulate cookie attributes by injecting arbitrary values through the unsanitized X-Forwarded-Prefix HTTP header used in Set-Cookie path attributes. Attackers can exploit a misconfigured reverse proxy to downgrade SameSite protection and enable cross-origin authenticated requests, bypassing cookie security controls.","aliases":["GHSA-c533-9qwm-8w5h"],"modified":"2026-07-22T05:32:58.799391991Z","published":"2026-07-20T18:57:15.799Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-113"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63771.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63771.json"},{"type":"ADVISORY","url":"https://github.com/vrana/adminer/releases#release-v5.4.3"},{"type":"ADVISORY","url":"https://github.com/vrana/adminer/security/advisories/GHSA-c533-9qwm-8w5h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63771"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/adminer-cookie-injection-via-x-forwarded-prefix-header"},{"type":"REPORT","url":"https://github.com/vrana/adminer/issues/1298"},{"type":"PACKAGE","url":"https://github.com/vrana/adminer"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vrana/adminer","events":[{"introduced":"0"},{"fixed":"189869c4a8f0f897848cdb58493b572178084d6c"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"5.4.3"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v5.4.2","v5.4.1","v5.4.0","v5.3.0","v5.2.1","v5.2.0","v5.1.1","v5.1.0","v5.0.6","v5.0.5","v5.0.4","v5.0.3","v5.0.2","v5.0.1","v5.0.0","v4.17.1","v4.17.0","v4.16.0","v4.8.1","v4.8.0","v4.7.9","v4.7.8","v4.7.7","v4.7.5","v4.7.4","v4.7.3","v4.7.2","v4.7.1","v4.7.0","v4.6.3","v4.6.2","v4.6.1","v4.6.0","v4.5.0","v4.4.0","v4.3.1","v4.3.0","v4.2.5","v4.2.4","v4.2.3","v4.2.2","v4.2.1","v4.2.0","v4.1.0","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v3.7.1","v3.7.0","v3.6.4","v3.6.3","v3.6.2","v3.6.1","v3.6.0","v3.5.1","v3.5.0","v3.4.0","v3.3.4","v3.3.3","v3.3.2","v3.3.1","v3.3.0","v3.2.2","v3.2.1","v3.2.0","v3.1.0","v3.0.1","v3.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63771.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"}]}