What’s Vulnerable › Vulnerabilities

CVE-2026-115369: OpenBao 2.5.0 before 2.6.2 PKI allowed_ip_sans_cidr Bypass via CSR IP SANs

• Severity: low (CVSS 2.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-22 · updated 2026-10-29
• Weakness: CWE-863

Description

OpenBao from 2.5.0 before 2.6.2 fails to enforce the PKI role allowed_ip_sans_cidr restriction on IP SANs taken from a CSR when use_csr_sans is enabled. Authenticated callers with sign permission can submit a CSR with an out-of-range IP SAN to pki/sign/<role> and obtain CA-signed certificates for unauthorized IPs.

Affected products

• openbao: from 2.5.0 before 2.6.2 — fixed in 2.6.2

How to fix

Upgrade to a fixed version: openbao 2.6.2. Check the vendor advisory for mitigations.

References

• https://github.com/openbao/openbao/security/advisories/GHSA-g892-p242-8g86
• https://www.vulncheck.com/advisories/openbao-2.5.0-before-2.6.2-pki-allowed-ip-sans-cidr-bypass-via-csr-ip-sans

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