OpenBao May Leak Sensitive Information in Logs When Processing Malformed Data
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-532.
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 may leak sensitive information in logs when processing malformed data. This is separate from the earlier HCSEC-2025-09 / CVE-2025-4166. This issue has been fixed in OpenBao v2.3.0 and later. Like with HCSEC-2025-09, there is no known workaround except to ensure properly formatted requests from all clients.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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/sdk/v2 (Go) | before 2.3.0 | 2.3.0 | Patch available | GHSA-8f5r-8cmq-7fmq |
- openbao Vendoropenbao Affected before 2.3.0 Fixed in 2.3.0 Patch available CNA
- github.com/openbao/openbao/sdk/v2 (Go) Vendor— Affected before 2.3.0 Fixed in 2.3.0 Patch available GHSA-8f5r-8cmq-7fmq
Remediation
- Fix · CNA openbao (openbao) Fixed in 2.3.0
- Fix · GHSA-8f5r-8cmq-7fmq github.com/openbao/openbao/sdk/v2 (Go) Fixed in 2.3.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-52893
- 2026-10-03 Alias added: GHSA-8f5r-8cmq-7fmq
References
Advisory 2
Other 4
- https://github.com/go-viper/mapstructure/pull/105
- https://github.com/go-viper/mapstructure/commit/ed3f92181528ff776a0324107b8b55026e93766a
- https://discuss.hashicorp.com/t/hcsec-2025-09-vault-may-expose-sensitive-information-in-error-logs-when-processing-malformed-data-with-the-kv-v2-plugin/74717
- https://github.com/go-viper/mapstructure/releases/tag/v2.3.0
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-2025-52893 · CVE Program
- CVE-2025-52893 · NVD
- FIRST EPSS
- GHSA-8f5r-8cmq-7fmq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences