CVE-2026-47831 Cryptographically Weak Password Generation in bosh-windows-stemcell-builder Allows Remote SSH Brute-Force Attacks
Weak random number generation in password creation allows remote attackers to brute-force SSH logins, compromising system access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-47831?
CVE-2026-47831 is a high-severity vulnerability in Cloud Foundry Foundation bosh-windows-stemcell-builder, published on 9 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Use of a cryptographically weak random number generator in the GenerateRandomPassword function in bosh-windows-stemcell-builder allows a remote attacker to brute-force the resulting SSH login via TCP/22. Affected versions: bosh-windows-stemcell-builder versions prior to v2019.98.
Which versions are affected by CVE-2026-47831?
How do I fix CVE-2026-47831?
No fix has been published for CVE-2026-47831 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-47831 being exploited?
There is no known exploitation of CVE-2026-47831 in the wild and no public exploit code.
Sources
Also known as GHSA-4qp9-f9vm-49xq.