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TI-2026-45358 Aliases CVE-2026-63771GHSA-hvv2-8jpj-gr8h

Adminer < 5.4.3 Cookie Injection via X-Forwarded-Prefix Header

Priority MEDIUM 60CWE-113Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0043 37th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed adminer (vrana): 5.4.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Admineradminerbefore 5.4.35.4.3Patch availableCNA
  • adminer VendorAdminer Affected before 5.4.3 Fixed in 5.4.3 Patch available CNA

Remediation

  • Fix · CNA adminer (vrana) Fixed in 5.4.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-63771
  2. 2026-10-03 Alias added: GHSA-hvv2-8jpj-gr8h

References

Exploit 1

Advisory 1

Other 1

  • TI-2021-04411 SSRF in adminer KEVCVSS 3.1HIGH 7.2
  • TI-2026-40884 Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection CVSS 4.0CRITICAL 9.3
  • TI-2026-71163 Remote code execution in Adminer via UTF-8 BOM SQLite bypass CVSS 4.0HIGH 8.6
  • TI-2026-40882 Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO CVSS 4.0HIGH 8.6
  • TI-2026-64854 Adminer before 6.0.2 Privileged-Port SSRF via host_port Regex CVSS 4.0MEDIUM 6.9
  • TI-2026-64852 Adminer before 6.0.2 Unauthenticated SSRF via Elasticsearch Driver CVSS 4.0MEDIUM 6.9
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences