CVE-2026-63771
High · 7.1CVSS
7.1
EPSS
0.4%
Published
Jul 20, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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