CVE-2026-42186: openbao — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0004

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-212 CWE-212

Affected Products

Vendor	Product	Versions
openbao	openbao	< 2.5.3

References

Advisories & Patches

https://github.com/openbao/openbao/commit/6d2e0506e2b41be0eaa6643bf7b4efc9a2c09445 https://github.com/openbao/openbao/security/advisories/GHSA-vv66-6rp4-wr4f

Other References

https://github.com/openbao/openbao/releases/tag/v2.5.3

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-42186? +

CVE-2026-42186 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0004, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-42186? +

CVE-2026-42186 affects products from openbao, specifically: openbao. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-42186? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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