{"apiVersion":"1.0","identifier":"CVE-2026-34959","description":"Adminer 4.6.0 before 5.5.0 prepends the client-supplied X-Forwarded-Prefix header to $_SERVER[-REQUEST_URI-] with no trusted-proxy check and no validation of the prefix value. An attacker can supply an absolute URL (e.g. X-Forwarded-Prefix: https://evil.example) that flows into Location redirect headers, the Set-Cookie path attribute, and self-referential links. This enables an authenticated open redirect after state-changing POSTs, unauthenticated control of the session cookie path attribute, and poisoning of self-referential links; CR/LF cannot be injected, so header splitting/XSS is not possible.","publishedAt":"2026-08-25T02:16:40","lastModifiedAt":"2026-08-26T15:16:47","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-34959","cvssScore":4.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","epssProbability":0.00208,"riskScore":0.48,"affectedProduct":"Adminer","affectedVersions":">=4.6.0,<5.5.0","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-34959","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-34959","en":"https://www.redsauce.net/en/cves/CVE-2026-34959","fr":"https://www.redsauce.net/fr/cves/CVE-2026-34959","pt":"https://www.redsauce.net/pt/cves/CVE-2026-34959","de":"https://www.redsauce.net/de/cves/CVE-2026-34959","sk":"https://www.redsauce.net/sk/cves/CVE-2026-34959","el":"https://www.redsauce.net/el/cves/CVE-2026-34959"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-34959"}}