#VU126408 Missing Authentication for Critical Function in Vault and Vault Enterprise - CVE-2026-5807

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Main Vulnerability Database Vulnerabilities #VU126408

#VU126408 Missing Authentication for Critical Function in Vault and Vault Enterprise - CVE-2026-5807

Published: April 17, 2026


Vulnerability identifier: #VU126408
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-5807
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Vault
Vault Enterprise
Software vendor:
HashiCorp

Description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper access control in the sys/rekey, sys/generate-root, and sys/rekey-recovery-key endpoints when handling unauthenticated root token generation or rekey requests. A remote attacker can repeatedly initiate or cancel operations to cause a denial of service.

The issue can occupy the single in-progress operation slot and prevent legitimate operators from completing these workflows.


Remediation

Install security update from vendor's website.

External links