What’s Vulnerable › Vulnerabilities

CVE-2026-115363: OpenBao 2.2.0 before 2.6.4 and 2.7.0 before 2.7.1 ACME EAB MAC Key Disclosure via Sanitized Configuration

• Severity: low (CVSS 3.3 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-212

Description

OpenBao 2.2.0 before 2.6.4 and 2.7.0 before 2.7.1 contains an information disclosure vulnerability that exposes the tls_acme_eab_mac_key value through the sys/config/state/sanitized endpoint. Callers of the sanitized configuration endpoint can retrieve the ACME External Account Binding MAC key used for TLS listener certificates, letting them bind to the operator's ACME account.

Affected products

• openbao: from 2.2.0 before 2.6.4; from 2.7.0 before 2.7.1 — fixed in 2.6.4, 2.7.1

How to fix

Upgrade to a fixed version: openbao 2.6.4, 2.7.1. Check the vendor advisory for mitigations.

References

• https://github.com/openbao/openbao/security/advisories/GHSA-3237-j65r-m5rp
• https://www.vulncheck.com/advisories/openbao-2.2.0-before-2.6.4-and-2.7.0-before-2.7.1-acme-eab-mac-key-disclosure-via-sanitized-configuration

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