CVE-2026-5807: HashiCorp Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations

April 17, 2026 (updated April 18, 2026)

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

discuss.hashicorp.com/t/hcsec-2026-08-vault-vulnerable-to-denial-of-service-via-unauthenticated-root-token-generation-rekey-operations/77345
github.com/advisories/GHSA-88v5-9hxc-f85r
github.com/hashicorp/vault
nvd.nist.gov/vuln/detail/CVE-2026-5807

Code Behaviors & Features

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