CVE-2026-16434

Katalog CVE

CVSS 2.3 · Low EPSS 0,39%

Kerentanan Improper Input Validation. Skor CVSS 4.0 2.3 (Low) menurut vulncheck.com.

Deskripsi (NVD)

Adminer 4.6.0 through 5.5.0 (fixed in 5.5.1) contains an incomplete fix for a prior X-Forwarded-Prefix vulnerability (GHSA-8478-xrj3-h9c2). The validation guard (bootstrap.inc.php) only rejects prefixes matching ^/[^/], blocking //evil.com but allowing values such as /\evil.com whose second character is a backslash. Because browsers normalize backslash to forward slash, a network-path reference survives into REQUEST_URI and reaches cookie_path(), affecting the Set-Cookie Path attribute. Exploitation requires that clients can set the X-Forwarded-Prefix header (a misconfigured or absent reverse proxy). Impact is limited to anomalous cookie-path scoping.

Rincian

Terbit di NVD

25 Agustus 2026

Terakhir diubah

12 Oktober 2026

Status NVD

Deferred

CVSS 4.0

2.3 (Low), sumber vulncheck.com
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation

EPSS (30 hari)

0,39% peluang dieksploitasi; lebih tinggi dari 30,6% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/vrana/adminer/security/advisories/GHSA-fr74-9mf9-gf44
• https://www.vulncheck.com/advisories/adminer-before-x-forwarded-prefix-backslash-bypass