CVE-2026-63771
High
Description
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.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Vrana Adminer
PublishedJul 20, 2026
First seenJul 20, 2026
Weakness typeCWE-113CWE-113
How to fix
Update
- vrana adminer5.4.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vrana adminer | v < 5.4.3 | 5.4.3 |
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