Information disclosure in Openbao
CVE-2025-52893
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Openbao — versions < 2.3.0
Weakness classification (CWE)
References
- github.com/openbao/openbao/security/advisories/GHSA-8f5r-8cmq-7fmq (Vendor Advisory)
- github.com/go-viper/mapstructure/pull/105 (Not Applicable)
- github.com/go-viper/mapstructure/commit/ed3f92181528ff776a0324107b8b55026e93766a (Not Applicable)
- github.com/openbao/openbao/commit/cf5e920badbf96b41253534a3fd5ff5063bf4b30 (Patch)
- discuss.hashicorp.com/t/hcsec-2025-09-vault-may-expose-sensitive-information-in… (Not Applicable)
- github.com/go-viper/mapstructure/releases/tag/v2.3.0 (Not Applicable)
Frequently asked questions
- What is CVE-2025-52893?
- CVE-2025-52893 is a medium-severity vulnerability in Openbao, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.5/10. Published 2025-06-25.
- How severe is CVE-2025-52893?
- Medium severity. CVSS v3 base score is 4.5 out of 10.