Vulnerability in Openbao
CVE-2026-42186
OpenBao is an open source identity-based secrets management system. Prior to 2.5.3, when OpenBao's initial namespace deletion fails, subsequent retries fail to properly remove all data before marking the namespace as deleted. This can affect any outstanding leases as well as potentially leaving unrelated storage entries around. This vulnerability is fixed in 2.5.3.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Openbao — versions < 2.5.3
Weakness classification (CWE)
References
- github.com/openbao/openbao/commit/6d2e0506e2b41be0eaa6643bf7b4efc9a2c09445 (Patch)
- github.com/openbao/openbao/releases/tag/v2.5.3 (Product, Release Notes)
- github.com/openbao/openbao/security/advisories/GHSA-vv66-6rp4-wr4f (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-42186?
- CVE-2026-42186 is a high-severity vulnerability in Openbao, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 7.5/10. Published 2026-05-14.
- How severe is CVE-2026-42186?
- High severity. CVSS v3 base score is 7.5 out of 10.