# CVE-2026-53546: Termix: Missing authorization in SSH host credential resolution exposes stored credentials

> An authenticated low-privileged user can access other users' stored SSH credentials due to missing authorization checks in host resolution.

- **Severity:** Critical 9.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/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:** 20 Aug 2026
- **Also known as:** GHSA-57gp-39c7-4g9r

## What is CVE-2026-53546?

CVE-2026-53546 is a critical missing authorization 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 terminal WebSocket accepts a user-controlled hostConfig.id and src/backend/ssh/host-resolver.ts resolves that host without requiring ownership or explicit access. When no credential is shared with the requester, resolveHostById performs an owner credential fallback, and src/backend/ssh/terminal.ts combines that credential with attacker-controlled ip, port, and username values. An authenticated low-privileged user can therefore make Termix authenticate to an attacker-controlled SSH server and disclose another user's stored SSH password or private-key material while the victim user's data key is unlocked. This issue is fixed in version 2.3.2.

Weakness: CWE-862 (Missing Authorization), CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-53546?


## How do I fix CVE-2026-53546?

No fix has been published for CVE-2026-53546 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-53546 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53546 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53546 and fix it if it is affected.

What it is: CVE-2026-53546 is a critical missing authorization 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-2026-53546 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-2026-53546/ (Markdown: https://insights.sbomify.com/CVE-2026-53546/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53546
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53546
- OSV: https://osv.dev/vulnerability/CVE-2026-53546

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53546/
Summaries are generated and may contain mistakes; the official description above is the record.