OpenBao Vulnerable to Unauthenticated Rekey Operation Cancellation
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.
Summary
OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. OpenBao before v2.3.0 allowed an attacker to perform unauthenticated, unaudited cancellation of root rekey and recovery rekey operations, effecting a denial of service. In OpenBao v2.2.0 and later, manually setting the configuration option `disable_unauthed_rekey_endpoints=true` allows an operator to deny these rarely-used endpoints on global listeners. A patch is available at commit fe75468822a22a88318c6079425357a02ae5b77b. In a future OpenBao release communicated on OpenBao's website, the maintainers will set this to `true` for all users and provide an authenticated alternative. As a workaround, if an active proxy or load balancer sits in front of OpenBao, an operator can deny requests to these endpoints from unauthorized IP ranges.
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 |
|---|---|---|---|---|---|
| openbao | openbao | before 2.3.0 | 2.3.0 | Patch available | CNA |
| — | github.com/openbao/openbao (Go) | 0.1.0 and later | — | No fix listed | GHSA-prpj-rchp-9j5h |
| — | github.com/openbao/openbao (Go) | before 0.0.0-20250625150133-fe75468822a2 | 0.0.0-20250625150133-fe75468822a2 | Patch available | GHSA-prpj-rchp-9j5h |
- openbao Vendoropenbao Affected before 2.3.0 Fixed in 2.3.0 Patch available CNA
- github.com/openbao/openbao (Go) Vendor— Affected 0.1.0 and later Fixed in — No fix listed GHSA-prpj-rchp-9j5h
- github.com/openbao/openbao (Go) Vendor— Affected before 0.0.0-20250625150133-fe75468822a2 Fixed in 0.0.0-20250625150133-fe75468822a2 Patch available GHSA-prpj-rchp-9j5h
Remediation
- Fix · CNA openbao (openbao) Fixed in 2.3.0
- Fix · GHSA-prpj-rchp-9j5h github.com/openbao/openbao (Go) Fixed in 0.0.0-20250625150133-fe75468822a2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-52894
- 2026-10-03 Alias added: GHSA-prpj-rchp-9j5h
References
Advisory 2
More Openbao vulnerabilities
- TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
- TI-2026-28381 OpenBao has Decompression Bomb via Unbounded Copy in OCI Plugin Extraction (DoS) CVSS 3.1MEDIUM 6.5
- TI-2026-26136 OpenBao lacks user confirmation for OIDC direct callback mode CVSS 3.1CRITICAL 9.6
- TI-2026-26137 OpenBao has Reflected XSS in its OIDC authentication error message CVSS 4.0CRITICAL 9.4
- TI-2025-34701 OpenBao: Privileged Operator May Execute Code on the Underlying Host CVSS 3.1CRITICAL 9.1
- TI-2025-36685 OpenBao vulnerable to denial of service via malicious JSON request processing CVSS 3.1HIGH 7.5
Sources
- CVE-2025-52894 · CVE Program
- CVE-2025-52894 · NVD
- FIRST EPSS
- GHSA-prpj-rchp-9j5h · GitHub Advisory Database · CC BY 4.0
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