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[ CVE-2026-71543 · Published 21 Sep 2026 ]

OpenBao's Templated Policies Allow Privilege Escalation via Wildcard Characters

CVSS 7.5 EPSS <1%Fix available

[ Description ]Official description

OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, templated ACL, PKI, and SSH policies could substitute attacker-controlled identity data without rejecting syntax-significant characters. In ACL templated policies, asterisks, plus signs, and slashes could alter path matching. In PKI allowed_uri_sans_template and allowed_domains policies, an asterisk could broaden certificate issuance to unauthorized domains. In SSH allowed_users and allowed_domains policies, a comma could add unauthorized principals. Exploitation requires a deployment to use templated policy data that users can freely modify; templates based on the randomly generated identity.entity.id value are not affected. This could allow privilege escalation, unauthorized access, and unauthorized certificate issuance. This issue is fixed in version 2.6.0.

[ Fixes ]Fixes and patches

[ Packages ]Affected open-source packages

  • github.com/openbao/openbao goAffected < 0.0.0-20260710001938-2d4ebafec5c5 · fixed in 0.0.0-20260710001938-2d4ebafec5c5 · GHSA-59w7-v8rr-pr4p
  • github.com/openbao/openbao goAffected >= 0.1.0, <= 1.1.5 · GHSA-59w7-v8rr-pr4p

[ References ]References