CVE-2026-5807

HIGH

Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations

Title source: cna

Description

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This vulnerability, CVE-2026-5807, is fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0.

References (1)

https://discuss.hashicorp.com/t/hcsec-2026-08-vault-vulnerable-to-denial-of-service-via-unauthenticated-root-token-generation-rekey-operations/77345

Scores

CVSS v3 7.5

EPSS 0.0002

EPSS Percentile 5.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-770

Status published

Products (4)

HashiCorp/Vault < 2.0.0

hashicorp/vault < 2.0.0 (2 CPE variants)

hashicorp/vault 0Go

HashiCorp/Vault Enterprise < 2.0.0.

Published Apr 17, 2026

Tracked Since Apr 17, 2026