Vrana Adminer up to 5.4.2 CSRF Token cross-site request forgery

Summaryinfo

A vulnerability was found in Vrana Adminer up to 5.4.2 and classified as problematic. Affected is an unknown function of the component CSRF Token. Executing a manipulation can lead to cross-site request forgery. This vulnerability appears as CVE-2026-56706. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in Vrana Adminer up to 5.4.2 and classified as problematic. This vulnerability affects an unknown code of the component CSRF Token. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-56706 since 06/22/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 5.4.3 eliminates this vulnerability.

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Productinfo

Vendor

• Vrana

Name

• Adminer

Version

• 5.4.0
• 5.4.1
• 5.4.2

Website

• Product: https://github.com/vrana/adminer/

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