CVE-2026-5807

Summary

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.

Affected Software

Weaknesses

• CWE-770: CWE-770: Allocation of Resources Without Limits or Throttling

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

Vault: Vault: Denial of Service via unauthenticated root token generation or rekey operations

Additional References

• https://access.redhat.com/security/cve/CVE-2026-5807
• https://bugzilla.redhat.com/show_bug.cgi?id=2459109
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5807.json

References

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

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