# CVE-2026-75431: Hardcoded credentials in n/a

> Remote attackers can execute arbitrary code on PowerJob Server due to a predictable JWT signing key used for authentication.

- **Severity:** Critical 9.1 (`CVSS:3.1/AC:L/AV:N/A:N/C:H/I:H/PR:N/S:U/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Sep 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-f4hf-w5c6-r4p5

## What is CVE-2026-75431?

CVE-2026-75431 is a critical vulnerability in n/a, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

PowerJob Server version 5.1.2 (and likely earlier) uses a predictable JWT signing key for HS256-based authentication. This allows a remote attacker to execute arbitrary code.

Weakness: CWE-321 (Use of Hard-coded Cryptographic Key)

## Which versions are affected by CVE-2026-75431?


## How do I fix CVE-2026-75431?

No fix has been published for CVE-2026-75431 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-75431 being exploited?

There is no known exploitation of CVE-2026-75431 in the wild and no public exploit code.

Public exploit code:

- https://github.com/unpredictable21/CVE-2026-75431_PowerJob_jwt_key_predictable (github_poc): https://github.com/unpredictable21/CVE-2026-75431_PowerJob_jwt_key_predictable

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-75431 and fix it if it is affected.

What it is: CVE-2026-75431 is a critical vulnerability in n/a, published on 4 Sep 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-2026-75431 in the wild and no public exploit code.

Affected product: n/a. 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-2026-75431/ (Markdown: https://insights.sbomify.com/CVE-2026-75431/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-75431
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-75431
- OSV: https://osv.dev/vulnerability/CVE-2026-75431

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-75431/
Summaries are generated and may contain mistakes; the official description above is the record.