CVE-2026-71543

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.

• CWE-863

• https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#201
• https://github.com/openbao/openbao/commit/2d4ebafec5c524408b3d4ac1198df909cb7ac8c1
• https://github.com/openbao/openbao/commit/e516ce508e1481504cadbfbf62052364339093bc
• https://github.com/openbao/openbao/pull/3401
• https://github.com/openbao/openbao/pull/3473
• https://github.com/openbao/openbao/releases/tag/v2.6.0
• https://github.com/openbao/openbao/security/advisories/GHSA-59w7-v8rr-pr4p

Published

Sep 21, 2026

Last Modified

Sep 25, 2026

Status

Awaiting Analysis

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