High severity · published May 14, 2026
CVE-2026-42186
OpenBao's Namespace Deletion May Not Delete Data Properly
7.5
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openbao · openbao
< 2.5.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42186
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42186
Patch
https://github.com/openbao/openbao/commit/6d2e0506e2b41be0eaa6643bf7b4efc9a2c09445
Product
https://github.com/openbao/openbao/releases/tag/v2.5.3
Mitigation
https://github.com/openbao/openbao/security/advisories/GHSA-vv66-6rp4-wr4f
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