# CVE-2026-53549: Termix: Server-Side Request Forgery via Proxy Connectivity Test

> An authenticated user can exploit unvalidated proxy test endpoints to access internal networks and cloud metadata, potentially exposing sensitive credentials.

- **Severity:** High 7.7 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Aug 2026
- **Updated:** 25 Aug 2026
- **Also known as:** GHSA-x9pr-795g-rm5f

## What is CVE-2026-53549?

CVE-2026-53549 is a high-severity server-side request forgery vulnerability in Termix-SSH Termix, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to 2.3.2, the POST /host/db/proxy/test endpoint accepts the singleProxy, proxyChain, and testTarget request fields without validating their destination addresses. The testProxyConnectivity path uses raw TCP and SOCKS connections to attacker-selected hosts and ports, allowing an authenticated user to probe localhost, private networks, link-local metadata services, and other infrastructure reachable from the Termix server. Structured connection errors disclose host reachability and timing information, and successful metadata access can expose cloud credentials. This issue is fixed in version 2.3.2.

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

## Which versions are affected by CVE-2026-53549?


## How do I fix CVE-2026-53549?

No fix has been published for CVE-2026-53549 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-53549 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53549 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53549 and fix it if it is affected.

What it is: CVE-2026-53549 is a high-severity server-side request forgery vulnerability in Termix-SSH Termix, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53549 exists.

Affected product: Termix-SSH Termix. 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-2026-53549/ (Markdown: https://insights.sbomify.com/CVE-2026-53549/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53549
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53549
- OSV: https://osv.dev/vulnerability/CVE-2026-53549

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53549/
Summaries are generated and may contain mistakes; the official description above is the record.