CVE-2026-47831 PUBLISHED

Cryptographically Weak Password Generation in bosh-windows-stemcell-builder Allows Remote SSH Brute-Force Attacks

Assigner: vmware
Reserved: 20.05.2026 Published: 09.07.2026 Updated: 09.07.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 7.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Cloud Foundry Foundation
Product	bosh-windows-stemcell-builder
Versions	Default: unaffected affected from 0 to 2019.98 (excl.)

References

https://www.cloudfoundry.org/blog/cve-2026-47831-cryptographically-weak-password-generation-in-bosh-windows-stemcell-builder-allows-remote-ssh-brute-force-attacks/

Problem Types

CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) CWE

Impacts

Remote SSH brute-force attacks against generated passwords with insufficient entropy.