CVE-2026-100696: Server-Side Request Forgery (SSRF) in vrana adminer
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.
AI Analysis
Technical Summary
Adminer versions >=0 and <6.0.2 include a pre-authentication SSRF vulnerability in the optional Elasticsearch driver (plugins/drivers/elastic.php). The vulnerability arises because the Driver::connect() method is invoked before login validation, allowing crafted auth parameters to trigger HTTP GET requests to arbitrary reachable hosts and ports. The driver does not block loopback, private, or reserved IP addresses and appends default port 9200 if none is specified. Ports below 1024 are rejected by Adminer's generic port check. Error responses and connection failures are displayed on the login page, providing an oracle for port scanning and internal network reconnaissance. Exploitation requires the Elasticsearch driver to be explicitly deployed and PHP's allow_url_fopen to be enabled. The issue is fixed in Adminer 6.0.2.
Potential Impact
An unauthenticated attacker can exploit this SSRF vulnerability to make the Adminer server issue HTTP requests to arbitrary internal or external hosts and ports. This can lead to internal network reconnaissance, port scanning, and service fingerprinting. The vulnerability does not require authentication but depends on the optional Elasticsearch driver being enabled and PHP configuration allowing URL fopen. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade Adminer to version 6.0.2 or later where this SSRF vulnerability is fixed. If upgrading is not immediately possible, ensure the optional Elasticsearch driver is not deployed and consider disabling PHP's allow_url_fopen setting to reduce risk.
CVE-2026-100696: Server-Side Request Forgery (SSRF) in vrana adminer
Description
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.
CVSS v4.0
Score 6.9medium
Affected software
vrana
adminer
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Adminer versions >=0 and <6.0.2 include a pre-authentication SSRF vulnerability in the optional Elasticsearch driver (plugins/drivers/elastic.php). The vulnerability arises because the Driver::connect() method is invoked before login validation, allowing crafted auth parameters to trigger HTTP GET requests to arbitrary reachable hosts and ports. The driver does not block loopback, private, or reserved IP addresses and appends default port 9200 if none is specified. Ports below 1024 are rejected by Adminer's generic port check. Error responses and connection failures are displayed on the login page, providing an oracle for port scanning and internal network reconnaissance. Exploitation requires the Elasticsearch driver to be explicitly deployed and PHP's allow_url_fopen to be enabled. The issue is fixed in Adminer 6.0.2.
Potential Impact
An unauthenticated attacker can exploit this SSRF vulnerability to make the Adminer server issue HTTP requests to arbitrary internal or external hosts and ports. This can lead to internal network reconnaissance, port scanning, and service fingerprinting. The vulnerability does not require authentication but depends on the optional Elasticsearch driver being enabled and PHP configuration allowing URL fopen. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade Adminer to version 6.0.2 or later where this SSRF vulnerability is fixed. If upgrading is not immediately possible, ensure the optional Elasticsearch driver is not deployed and consider disabling PHP's allow_url_fopen setting to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-26T02:39:50.972Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab7c9adf7a7c5410652fd60
Added to database: 09/26/2026, 13:33:33 UTC
Last enriched: 09/26/2026, 13:48:13 UTC
Last updated: 09/27/2026, 04:00:08 UTC
Views: 21
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