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🛡️ CVE-2026-42186 — openbao

🟢 CVSS 2.0 — Low ✅ No Known Exploit CWE-212 OSV
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.

CVSS metrics in full

The score comes from this 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

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
  • Attack requirements: Present — the target has to be in a particular state for the attack to work.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Confidentiality impact: None.
  • Integrity impact: Low — limited, and the attacker does not choose what is affected.
  • Availability impact: 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 2 packages.

  • github.com/openbao/openbao
  • openbao

Timeline and source

Published on 25 June 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 OSV.

References

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

Other advisories for this package

github.com/openbao/openbao has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-212: Improper Removal of Sensitive Information) in other software:

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 OSV
Published 2026-06-25
Updated 2026-08-20
Modified 2026-07-27

Affected Packages

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

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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