# CVE-2026-15686: Adminer multi_query Incorrect Check of Function Return Value Remote Code Execution Vulnerability

> Remote attackers with authentication can execute arbitrary code on Adminer installations due to an incorrect return value check in the multi_query method.

- **Severity:** High 7.2 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Aug 2026
- **Updated:** 22 Aug 2026
- **Also known as:** DEBIAN-CVE-2026-15686, GHSA-3582-q6xq-5vf7, GHSA-cmr6-cvgm-wxx6, UBUNTU-CVE-2026-15686

## What is CVE-2026-15686?

CVE-2026-15686 is a high-severity code injection vulnerability in Adminer, published on 20 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Adminer multi_query Incorrect Check of Function Return Value Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Adminer. Authentication is required to exploit this vulnerability.

The specific flaw exists within the multi_query method. The issue results from an incorrect check of a function return value. An attacker can leverage this vulnerability to execute code in the context of the web server. Was ZDI-CAN-28201.

Weakness: CWE-253 (Incorrect Check of Function Return Value)

## Which versions are affected by CVE-2026-15686?


## How do I fix CVE-2026-15686?

Apply the vendor's patch.

## Is CVE-2026-15686 being exploited?

There is no known exploitation of CVE-2026-15686 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15686 and fix it if it is affected.

What it is: CVE-2026-15686 is a high-severity code injection vulnerability in Adminer, published on 20 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-15686 in the wild and no public exploit code.

Affected product: 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-2026-15686/ (Markdown: https://insights.sbomify.com/CVE-2026-15686/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15686
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15686
- OSV: https://osv.dev/vulnerability/CVE-2026-15686

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15686/
Summaries are generated and may contain mistakes; the official description above is the record.