What is CVE-2026-75431?

CVE-2026-75431 is a critical-severity vulnerability in N/a, classified under Use of Hard-coded Cryptographic Key. CVSS score: 9.1/10. Published 2026-09-04.

How severe is CVE-2026-75431?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2026-75431 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in N/a

CVE-2026-75431

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.

Published 2026-09-04 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.4th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.011 · change: +0.003

Weakness classification (CWE)

CWE-321 — Use of Hard-coded Cryptographic Key

Public proof-of-concept exploits

unpredictable21/CVE-2026-75431_PowerJob_jwt_key_predictable

References

Frequently asked questions

What is CVE-2026-75431?: CVE-2026-75431 is a critical-severity vulnerability in N/a, classified under Use of Hard-coded Cryptographic Key. CVSS score: 9.1/10. Published 2026-09-04.
How severe is CVE-2026-75431?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2026-75431 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.