🛡️ CVE-2026-42186 — openbao

🟢 CVSS 2.0 — Low ✅ No Known Exploit CWE-212 NVD
2.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

OpenBao's Namespace Deletion May Not Delete Data Properly

Impact

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.

Patches

This will be patched in OpenBao v2.5.3.

Workarounds

Users may manually remove mounts prior to deleting the namespace.

Audit logs may be used to identify repeated deletion attempts against the same namespace; sys/raw can be used to see what leases were not correctly deleted.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity low, availability none.

Weakness class

CVE-2026-42186 is classified as CWE-212: Improper Removal of Sensitive Information. Data is passed on without stripping sensitive fields that the recipient should not receive.

Affected software

CVE-2026-42186 is recorded against 3 packages.

  • github.com/openbao/openbao
  • openbao
  • unknown

Timeline and source

Published on 5 May 2026 and last revised on 27 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
github.com (Web)

Details

Severity LOW
CVSS Score 2.0
CVSS 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
CWE CWE-212
Public Exploit ✅ No
Source NVD
Published 2026-05-05
Updated 2026-08-12
Modified 2026-07-27

Affected Packages

Software From version Fixed in
github.com/openbao/openbao — —
openbao — —
unknown — —

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