---
id: CVE-2026-100696
title: >-
  Adminer 4.16.0 through 6.0.1 contain a pre-authentication Server-Side Request
  Forgery (SSRF) vulnerability in the optional Elasticsearch driver
  (plugins/drivers/elastic.php), fixed in 6.0.2
summary: >-
  Adminer 4.16.0 through 6.0.1 contain a pre-authentication Server-Side Request
  Forgery (SSRF) vulnerability in the optional Elasticsearch driver
  (plugins/drivers/elastic.php), fixed in 6.0.2. Because
  adminer/include/auth.inc.php invokes D…
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'
cwe:
  - CWE-918
vendor: vrana
product: adminer
affected:
  - adminer < 6.0.2
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T14:16:54.437'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100696'
references:
  - url: 'https://github.com/vrana/adminer/security/advisories/GHSA-q8h3-4cx4-prgm'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/adminer-before-6.0.2-unauthenticated-ssrf-via-elasticsearch-driver
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T13:33:20.903Z'
---

## Overview

Adminer 4.16.0 through 6.0.1 contain a pre-authentication Server-Side Request Forgery (SSRF) vulnerability in the optional Elasticsearch driver (plugins/drivers/elastic.php), fixed in 6.0.2. Because adminer/include/auth.inc.php invokes Driver::connect() before the login result is validated, an unauthenticated attacker who submits crafted auth[server], auth[username], and auth[password] parameters can cause the Adminer server to issue an HTTP GET request (via get_url()/file_get_contents()) to an arbitrary reachable host and port. The driver validates only general server syntax and does not block loopback, private, link-local, or other reserved addresses; if no port is given it appends the default 9200, and Adminer's generic port check rejects ports below 1024. Selected JSON error fields from non-2xx Elasticsearch-style responses, as well as connection failures, are rendered on the login page, providing a port-scanning oracle and enabling internal network reconnaissance and service fingerprinting. Exploitation requires that the optional Elasticsearch driver be explicitly deployed (e.g., via the adminer/elastic.php template or an adminer_object() configuration; it is not loaded in a default build) and that PHP allow_url_fopen be enabled.

## Remediation

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