Vulnerability · Published May 14, 2026 · Assigned by GitHub_M

CVE-2026-42186OpenBao's Namespace Deletion May Not Delete Data Properly

Low 2.3

In plain English

A low-severity security flaw in openbao from openbao. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)2.3Low

Exploit odds (30 days)0.2%top 83.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/openbao/openbao	0.0.0-20260420173541-6d2e0506e2b4	GHSA-vv66-6rp4-wr4f
Go	github.com/openbao/openbao	0.0.0-20260420173541-6d2e0506e2b4	GO-2026-5674

Affected products (as reported)

Vendor	Product	Versions
openbao	openbao	< 2.5.3

Weakness: CWE-212 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

References

https://github.com/openbao/openbao/security/advisories/GHSA-vv66-6rp4-wr4f x_refsource_CONFIRM
https://github.com/openbao/openbao/commit/6d2e0506e2b41be0eaa6643bf7b4efc9a2c09445 x_refsource_MISC
https://github.com/openbao/openbao/releases/tag/v2.5.3 x_refsource_MISC