# CVE-2026-125637: A flaw was found in the Konflux UI proxy.

> Users able to edit the KonfluxUI custom resource can inject Caddyfile directives to bypass authentication or break the proxy.

- **Severity:** High 7.2 (`CVSS:3.1/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
- **Harmful if only installed:** No
- **Needs a specific call:** No
- **Fix available:** No
- **Published:** 11 Nov 2026
- **Updated:** 12 Nov 2026
- **Also known as:** GHSA-8f8v-qvrj-8v89

## What is CVE-2026-125637?

CVE-2026-125637 is a high-severity code injection vulnerability, published on 11 Nov 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A flaw was found in the Konflux UI proxy. Hostname values defined in the KonfluxUI custom resource are inserted directly into proxy configuration files without adequate validation or sanitization. An authenticated user with permissions to modify the custom resource can inject malicious configuration directives to bypass authentication and authorization controls, potentially exposing internal backend services. In addition, providing malformed input can cause the configuration generator to fail, resulting in a denial of service (DoS) by preventing the proxy from starting.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-125637?

An affected version is exposed as installed. No special setting or call is needed.


## How do I fix CVE-2026-125637?

No fix has been published for CVE-2026-125637 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-125637 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-125637 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-125637 and fix it if it is affected.

What it is: CVE-2026-125637 is a high-severity code injection vulnerability, published on 11 Nov 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-125637 exists.
Exposure: An affected version is exposed as installed. No special setting or call is needed.

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-2026-125637/ (Markdown: https://insights.sbomify.com/CVE-2026-125637/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-125637
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-125637
- OSV: https://osv.dev/vulnerability/CVE-2026-125637

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-125637/
Summaries are generated and may contain mistakes; the official description above is the record.