# CVE-2026-5000: PromtEngineer localGPT API Endpoint server.py LocalGPTHandler missing authentication

> Remote attackers can access the localGPT API endpoint without authentication, potentially reading or modifying data.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Mar 2026
- **Updated:** 1 Apr 2026
- **Also known as:** GHSA-wwwf-53m5-vmfq

## What is CVE-2026-5000?

CVE-2026-5000 is a medium-severity missing authorization vulnerability in PromtEngineer localGPT, published on 28 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was detected in PromtEngineer localGPT up to 4d41c7d1713b16b216d8e062e51a5dd88b20b054. Impacted is the function LocalGPTHandler of the file backend/server.py of the component API Endpoint. The manipulation of the argument BaseHTTPRequestHandler results in missing authentication. The attack can be executed remotely. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-306 (Missing Authentication for Critical Functionality), CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-5000?


## How do I fix CVE-2026-5000?

No fix has been published for CVE-2026-5000 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5000 being exploited?

There is no known exploitation of CVE-2026-5000 in the wild and no public exploit code.

Public exploit code:

- This is for Windows defender bypass (github_poc): https://github.com/Perl-Code/CVE-2026-5000

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5000 and fix it if it is affected.

What it is: CVE-2026-5000 is a medium-severity missing authorization vulnerability in PromtEngineer localGPT, published on 28 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-5000 in the wild and no public exploit code.

Affected product: PromtEngineer localGPT. 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-2026-5000/ (Markdown: https://insights.sbomify.com/CVE-2026-5000/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5000
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5000
- OSV: https://osv.dev/vulnerability/CVE-2026-5000

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5000/
Summaries are generated and may contain mistakes; the official description above is the record.