CVE-2026-40264

Description

OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation. Prior to version 2.5.3, a tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant. This is addressed in v2.5.3.

CVSS v3.1 Score

2.7

LOW

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

EPSS — Exploit Prediction

0.0005

Probability of exploitation

0.14%

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-1259 CWE-1259

Affected Products

Vendor	Product	Versions
openbao	openbao	< 2.5.3

References

Advisories & Patches

https://github.com/openbao/openbao/security/advisories/GHSA-p49j-v9wc-wg57

Frequently Asked Questions

What is CVE-2026-40264? +

OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation. Prior to version 2.5.3, a tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant. This is addressed in v2.5.3. It has a CVSS v3.1 base score of 2.7 (LOW).

How severe is CVE-2026-40264? +

CVE-2026-40264 has a CVSS v3.1 score of 2.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0005, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40264? +

CVE-2026-40264 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-2026-40264? +

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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