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CVE-2026-56706— Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking

Quick assessment

Affected
vrana adminer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Adminer 5.4.3 之前的版本中，其 CSRF 令牌机制存在安全缺陷：每个令牌均同时传输异或掩码（XOR mask）和掩码后的值，格式为 。攻击者若通过嗅探网络流量、日志文件、Referer 头信息或跨站脚本攻击（XSS）等方式观察到单个 CSRF 令牌，仅执行一次异或运算即可还原出会话密钥（secret），进而伪造无限数量的有效令牌。 该实现的安全性进一步被以下因素削弱： 1. 会话令牌（rand）的熵值较低（取值范围为 1 到 1,000,000，约 20 比特），使得攻击者能够进行盲暴力破解； 2

CVSS 6.8 · Medium EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
vrana adminer < 5.4.3 affected
5.4.3 unaffected
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I. Basic Information for CVE-2026-56706

Vulnerability Information
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Vulnerability Title
Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用不充分的随机数
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vrana adminer 0 ~ 5.4.3 -

II. Public POCs for CVE-2026-56706

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III. Intelligence Information for CVE-2026-56706

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Vendor Advisories for CVE-2026-56706 (2)

Same Patch Batch · vrana · 2026-08-25 · 10 CVEs total

CVE-2026-56705 9.8 CRITICAL Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection
CVE-2026-56702 8.8 HIGH Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload
CVE-2026-34968 8.1 HIGH Adminer before 5.4.3 Arbitrary File Deletion via SQLite Drop
CVE-2026-56703 7.2 HIGH Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO
CVE-2026-56704 6.1 MEDIUM Adminer before 5.4.3 Cross-Site Scripting via MySQL Version String
CVE-2026-34964 5.8 MEDIUM Adminer before 5.5.0 SSRF via PDO DSN Injection
CVE-2026-34967 5.4 MEDIUM Adminer sql-log Plugin 5.3.0 through 5.4.2 Arbitrary File Write
CVE-2026-34959 4.7 MEDIUM Adminer before 5.5.0 Open Redirect via X-Forwarded-Prefix
CVE-2026-16434 2.3 LOW Adminer before 5.5.1 X-Forwarded-Prefix Backslash Bypass

IV. Related Vulnerabilities

Same product: adminer
Same vendor: vrana
Same weakness: CWE-330

V. Comments for CVE-2026-56706

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