# CVE-2026-100696: Adminer before 6.0.2 Unauthenticated SSRF via Elasticsearch Driver

> Unauthenticated attackers can perform Server-Side Request Forgery to scan internal networks and fingerprint services if the optional Elasticsearch driver is enabled.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 Sep 2026
- **Updated:** 28 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-100696, GHSA-c9jj-9w3r-2hj8, GHSA-q8h3-4cx4-prgm, UBUNTU-CVE-2026-100696

## What is CVE-2026-100696?

CVE-2026-100696 is a medium-severity server-side request forgery vulnerability in vrana adminer, published on 26 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-100696?


## How do I fix CVE-2026-100696?

Upgrade to a fixed version.

## Is CVE-2026-100696 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100696 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100696 and fix it if it is affected.

What it is: CVE-2026-100696 is a medium-severity server-side request forgery vulnerability in vrana adminer, published on 26 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100696 exists.

Affected product: vrana adminer. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-100696/ (Markdown: https://insights.sbomify.com/CVE-2026-100696/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100696
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100696
- OSV: https://osv.dev/vulnerability/CVE-2026-100696

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-100696/
Summaries are generated and may contain mistakes; the official description above is the record.