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CVE-2026-63771

HIGH Exploitation: PoC
7.1
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-63771
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-18 12:34 UTC
Published
2026-07-20 18:57 UTC
Last updated
2026-07-20 21:43 UTC
Primary CWE
CWE-113
Improper Neutralization of CRLF Sequences in HTTP Headers ('…
Vendor / Product
vrana / adminer
Sources
cve.org  ·  NVD

Severity & Metrics

7.1 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
vrana adminer — 0 < 5.4.3
Weakness (CWE)
CWESourceDescription
CWE-113 cna Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CVSS scores (2)
ScoreSeverityVersionSourceVector
7.1 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
6.0 MEDIUM 4.0 cna 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
References (4)
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