Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| HashiCorp | Vault | before 2.0.0 | 2.0.0 | Patch available | CNA |
| HashiCorp | Vault Enterprise | before 2.0.0. | 2.0.0. | Patch available | CNA |
| — | github.com/hashicorp/vault (Go) | up to 1.21.4 | — | No fix listed | GHSA-88v5-9hxc-f85r |
Remediation
- Fix · CNA Vault (HashiCorp) Fixed in 2.0.0
- Fix · CNA Vault Enterprise (HashiCorp) Fixed in 2.0.0.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
HashiCorp Vault 2.0.0
4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-04407 Vault Vulnerable to Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNSPriority MEDIUM 43
- TI-2026-03930 Vault Token Leaked to Backends via Authorization: Bearer Passthrough HeaderPriority MEDIUM 40
- TI-2026-03109 Vault KVv2 Metadata and Secret Deletion Policy Bypass Denial-of-ServicePriority LOW 37
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Openshift Data Foundation 4 | Affected | No fix yet |
Not affected: 2 products
- Red Hat OpenShift Container Platform 4
- Red Hat Openshift Data Foundation 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-5807
- 2026-10-03 Alias added: GHSA-88v5-9hxc-f85r
References
Advisory 3
More HashiCorp Vault vulnerabilities
- TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
- TI-2022-19053 An issue was discovered in HashiCorp Vault and Vault Enterprise before 1.11.3. CVSS 3.1CRITICAL 9.1
- TI-2020-17874 The official vault docker images before 0.11.6 contain a blank password for a root user. CVSS 3.1CRITICAL 9.8
- TI-2020-10142 HashiCorp Vault and Vault Enterprise 1.4.0 and 1.4.1, when configured with the GCP… CVSS 3.1CRITICAL 9.8
- TI-2026-04407 Vault Vulnerable to Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS CVSS 3.1HIGH 8.6
- TI-2025-05421 Arbitrary Remote Code Execution via Plugin Catalog Abuse CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-5807 · CVE Program
- CVE-2026-5807 · NVD
- FIRST EPSS
- GHSA-88v5-9hxc-f85r · GitHub Advisory Database · CC BY 4.0
- CVE-2026-5807 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences