---
id: CVE-2026-56706
title: >-
  Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask
  and the masked value in every token (format (rand XOR secret):rand), allowing
  anyone who observes a single CSRF token (e.g., via network sniffing, log
  files, …
summary: >-
  Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask
  and the masked value in every token (format (rand XOR secret):rand), allowing
  anyone who observes a single CSRF token (e.g., via network sniffing, log
  files, …
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H'
cwe:
  - CWE-330
published: '2026-08-25'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:23:49.880'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56706'
references:
  - url: 'https://github.com/vrana/adminer/security/advisories/GHSA-33j4-hc95-pggg'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/adminer-before-csrf-token-secret-recovery-via-xor-masking
    label: disclosure@vulncheck.com
  - url: 'https://github.com/vrana/adminer/security/advisories/GHSA-33j4-hc95-pggg'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00411
epssPercentile: 0.32571
ingestedAt: '2026-09-08T21:11:12.285Z'
---

## Overview

Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask and the masked value in every token (format (rand XOR secret):rand), allowing anyone who observes a single CSRF token (e.g., via network sniffing, log files, Referrer header, or XSS) to recover the session secret with a single XOR operation and forge unlimited valid tokens. The implementation is further weakened by a low-entropy session token (rand(1,1e6), ~20 bits) that permits blind brute-force, and by use of loose comparison (==) in token verification, enabling PHP type juggling. Exploitation enables cross-site request forgery against authenticated sessions, including execution of arbitrary SQL queries.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.