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

Quick assessment

Affected
openbao openbao
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenBao是OpenBao开源的一个敏感数据管理软件。 OpenBao 2.5.3之前版本存在安全漏洞，该漏洞源于初始命名空间删除失败时，后续重试未能正确删除所有数据，可能导致影响未完成租约以及留下无关存储条目。

AI Predicted 5.5 Difficulty: Easy EPSS 0.43% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
openbao openbao < 2.5.3 affected
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I. Basic Information for CVE-2026-42186

Vulnerability Information
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Vulnerability Title
OpenBao's Namespace Deletion May Not Delete Data Properly
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的不恰当跨边界移除
Source: CVE Program / CVE List V5
Vulnerability Title
OpenBao 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenBao是OpenBao开源的一个敏感数据管理软件。 OpenBao 2.5.3之前版本存在安全漏洞，该漏洞源于初始命名空间删除失败时，后续重试未能正确删除所有数据，可能导致影响未完成租约以及留下无关存储条目。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openbao openbao < 2.5.3 -

II. Public POCs for CVE-2026-42186

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III. Intelligence Information for CVE-2026-42186

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Patches & Fixes for CVE-2026-42186 (1)

Vendor Advisories for CVE-2026-42186 (1)

IV. Related Vulnerabilities

Same product: openbao
Same vendor: openbao
Same weakness: CWE-212

V. Comments for CVE-2026-42186

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