HashiCorp Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-5807US | — | — | ||
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 si… | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/CVE-2026-5807WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=2459109WEB
- https://discuss.hashicorp.com/t/hcsec-2026-08-vault-vulnerable-to-denial-of-service-via-unauthenticated-root-token-generation-rekey-operations/77345WEB
- https://github.com/advisories/GHSA-88v5-9hxc-f85rADVISORY
- https://github.com/hashicorp/vaultPACKAGE
- https://nvd.nist.gov/vuln/detail/CVE-2026-5807ADVISORY
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5807.jsonWEB
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