High severity · published Apr 17, 2026
CVE-2026-5807
Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations
7.5
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VA
Vault · HashiCorp
before 2.0.0 · source: vendor, NVD
VE
Vault Enterprise · HashiCorp
before 2.0.0. · source: vendor
RH
Red Hat Openshift Data Foundation 4 · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5807
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5807
Vendor Advisory
https://discuss.hashicorp.com/t/hcsec-2026-08-vault-vulnerable-to-denial-of-service-via-unauthenticated-root-token-generation-rekey-operations/77345
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-5807
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2459109
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5807.json
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