vrana Adminer up to 6.0.1 Login Page functions.inc.php host_port server-side request forgery

Summaryinfo

A vulnerability labeled as critical has been found in vrana Adminer up to 6.0.1. The affected element is the function host_port of the file adminer/include/functions.inc.php of the component Login Page. The manipulation results in server-side request forgery. This vulnerability was named CVE-2026-100698. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in vrana Adminer up to 6.0.1. It has been classified as critical. Affected is the function host_port of the file adminer/include/functions.inc.php of the component Login Page. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Adminer 5.5.1 through 6.0.1 improperly parses the login 'server' string in the host_port() function in adminer/include/functions.inc.php. The port capture group requires pure digits anchored to the end of the string, so any server value with a non-digit tail fails the regex and falls back to returning the whole string as the host with an empty port. Because the privileged-port restriction in adminer/include/auth.inc.php inspects only the parsed port, the check is skipped, and the mysqli/mysqlnd client subsequently re-parses host:port from the host string and opens a TCP connection. A remote, unauthenticated attacker who can reach the Adminer login page can submit a crafted value such as 127.0.0.1:80/x to make the server initiate TCP connections to arbitrary internal hosts and privileged ports before credentials are validated, enabling server-side request forgery and blind internal port scanning (connection refused vs. handshake vs. timeout acts as a liveness oracle). This is a regression that re-opens the bypass fixed in 5.5.0 (GHSA-58cq-mgw2-38m5). Fixed in 6.0.2.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-100698 since 09/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

By approaching the search of inurl:adminer/include/functions.inc.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 6.0.2 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• vrana

Name

• Adminer

Version

• 6.0.0
• 6.0.1

Website

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

CPE 2.3info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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