HashiCorp Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations
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Details
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.
The fix
No fix commit could be resolved for this advisory (it may reference an issue tracker or a non-GitHub patch). See the references below.
References
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-5807
- WEBhttps://access.redhat.com/security/cve/CVE-2026-5807
- WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=2459109
- WEBhttps://discuss.hashicorp.com/t/hcsec-2026-08-vault-vulnerable-to-denial-of-service-via-unauthenticated-root-token-generation-rekey-operations/77345
- ADVISORYhttps://github.com/advisories/GHSA-88v5-9hxc-f85r
- PACKAGEhttps://github.com/hashicorp/vault
- WEBhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5807.json