CVE-2026-42186: OpenBao is an open source identity-based secrets management system

Q: How do I fix CVE-2026-42186?

openbao: upgrade to 2.5.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-42186 being exploited?

CVE-2026-42186 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-42186 affect?

CVE-2026-42186 affects openbao. Severity is high (CVSS 7.5). 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 affec

Q: How urgent is CVE-2026-42186?

Priority 35/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2026-42186 is a high-severity flaw (CVSS 7.5) affecting openbao. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-212
Published	2026-05-14
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: openbao

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-14 15:16 UTCPublished CVE record published
2026-06-17 10:47 UTCUpdated Record last modified

openbao openbao UPGRADE

Affected: < 2.5.3

Fixed in: 2.5.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openbao || rpm -q openbao || openbao --version

2. UPGRADE to 2.5.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openbao

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openbao

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42186?

openbao: upgrade to 2.5.3. Exact commands for each OS are on this page.

Is CVE-2026-42186 being exploited?

CVE-2026-42186 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42186 affect?

CVE-2026-42186 affects openbao. Severity is high (CVSS 7.5). 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 affec

How urgent is CVE-2026-42186?

Priority 35/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-40264 LOW 2.7 UPGRADE OpenBao is an open source identity-based secrets management system
CVE-2026-39946 MEDIUM 4.9 UPGRADE OpenBao is an open source identity-based secrets management system
CVE-2026-39396 LOW 3.1 UPGRADE OpenBao is an open source identity-based secrets management system
CVE-2026-39388 LOW 3.1 UPGRADE OpenBao is an open source identity-based secrets management system

References

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