Is CVE-2026-42186 in the CISA KEV catalog?

No. CVE-2026-42186 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-42186?

CVE-2026-42186 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2026-42186?

CVE-2026-42186 has an EPSS score of 0.25% (16th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42186?

Upgrade openbao to 2.5.3 or later.

CVE & CISA-KEV Catalog

CVE-2026-42186

HIGH

7.5

CVSS v3

NVD

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.

CWE-212

How to fix

Remediation Available

openbaoNVD

Affected:< 2.5.3Fixed in:2.5.3CVE-2026-42186derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.25%probability of exploitation in 30 days

16thpercentile

Low risk: more likely to be exploited than 16% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-212 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-1940	High	7.5	4.5%	-	-
CVE-2022-29900	Medium	6.5	3.8%	-	Fix
CVE-2002-0704	High	7.5	3.2%	-	-
CVE-2020-15094	High	8.0	3.0%	-	Fix
CVE-2022-23633	High	7.4	2.2%	-	Fix
CVE-2019-19362	Medium	6.5	2.1%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-18.