How severe is CVE-2026-42186?

CVE-2026-42186 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-42186 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42186?

CVE-2026-42186 affects Openbao. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42186?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42186 have an EU (EUVD) identifier?

Yes. CVE-2026-42186 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30298.

When was CVE-2026-42186 published?

CVE-2026-42186 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-42186

CVE-2026-42186 is a high-severity vulnerability in Openbao with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-212.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 2.3
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30298
Weakness: CWE-212
Affected product: Openbao
Published: 2026-05-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-42186?: 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.
How severe is CVE-2026-42186?: CVE-2026-42186 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-42186 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42186?: CVE-2026-42186 affects Openbao. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42186?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42186 have an EU (EUVD) identifier?: Yes. CVE-2026-42186 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30298.
When was CVE-2026-42186 published?: CVE-2026-42186 was published on 2026-05-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openbao:openbao:*:*:*:*:*:*:*:*

More vulnerabilities in Openbao

CVE-2026-33757 — Critical (CVSS 9.6): OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao does not prompt for…
CVE-2025-54997 — Critical (CVSS 9.1): OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets,…
CVE-2024-2048 — High (CVSS 8.1): Vault and Vault Enterprise (“Vault”) TLS certificate auth method did not correctly validate client certificates…
CVE-2025-62513 — High (CVSS 7.5): OpenBao is an open source identity-based secrets management system. In versions 2.2.0 to 2.4.1, OpenBao's audit log…
CVE-2025-59043 — High (CVSS 7.5): OpenBao is an open source identity-based secrets management system. In OpenBao versions prior to 2.4.1, JSON objects…
CVE-2025-52894 — High (CVSS 7.5): OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets,…

All CVEs affecting Openbao →

Other CWE-212 vulnerabilities

CVE-2022-2818 — Critical (CVSS 9.8): Improper Removal of Sensitive Information Before Storage or Transfer in GitHub repository cockpit-hq/cockpit prior to…
CVE-2020-11684 — Critical (CVSS 9.1): AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control…
CVE-2026-39937 — High (CVSS 8.8): Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation…
CVE-2022-30617 — High (CVSS 8.8): An authenticated user with access to the Strapi admin panel can view private and sensitive data, such as email and…
CVE-2022-0355 — High (CVSS 8.8): Improper Removal of Sensitive Information Before Storage or Transfer in NPM simple-get prior to 4.0.1.
CVE-2021-0340 — High (CVSS 8.8): In parseNextBox of IsoInterface.java, there is a possible leak of unredacted location information due to improper input…

Browse all CWE-212 vulnerabilities →