Server-Side Request Forgery (SSRF) Affecting adminer package, versions <6.0.2-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.28% (19th percentile)

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  • Snyk IDSNYK-DEBIAN14-ADMINER-20154150
  • published27 Sept 2026
  • disclosed26 Sept 2026

Introduced: 26 Sep 2026

NewCVE-2026-100698  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Debian:14 adminer to version 6.0.2-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream adminer package and not the adminer package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1