{"id":"BIT-openbao-2026-71543","summary":"OpenBao's Templated Policies Allow Privilege Escalation via Wildcard Characters","details":"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.","aliases":["CVE-2026-71543","GHSA-59w7-v8rr-pr4p"],"modified":"2026-09-29T10:10:32.315529116Z","published":"2026-09-29T08:53:02.630Z","database_specific":{"cpes":["cpe:2.3:a:openbao:openbao:*:*:*:*:*:go:*:*"],"severity":"High"},"references":[{"type":"WEB","url":"https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#201"},{"type":"WEB","url":"https://github.com/openbao/openbao/commit/2d4ebafec5c524408b3d4ac1198df909cb7ac8c1"},{"type":"WEB","url":"https://github.com/openbao/openbao/commit/e516ce508e1481504cadbfbf62052364339093bc"},{"type":"WEB","url":"https://github.com/openbao/openbao/pull/3401"},{"type":"WEB","url":"https://github.com/openbao/openbao/pull/3473"},{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.6.0"},{"type":"WEB","url":"https://github.com/openbao/openbao/security/advisories/GHSA-59w7-v8rr-pr4p"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71543"}],"affected":[{"package":{"name":"openbao","ecosystem":"Bitnami","purl":"pkg:bitnami/openbao"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.6.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/openbao/BIT-openbao-2026-71543.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}