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CVE-2026-71543— OpenBao's Templated Policies Allow Privilege Escalation via Wildcard Characters

Quick assessment

Affected
openbao openbao
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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, p

CVSS 7.5 · High EPSS 0.25% · P17

Affected Version Matrix 1

VendorProduct Version RangeStatus
openbao openbao <2.6.0 affected
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I. Basic Information for CVE-2026-71543

Vulnerability Information

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Vulnerability Title
OpenBao's Templated Policies Allow Privilege Escalation via Wildcard Characters
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
openbao openbao <2.6.0 -

II. Public POCs for CVE-2026-71543

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III. Intelligence Information for CVE-2026-71543

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Patches & Fixes for CVE-2026-71543 (2)

Vendor Pages for CVE-2026-71543 (1)

Other References for CVE-2026-71543 (1)

Other References for CVE-2026-71543 (1)

IV. Related Vulnerabilities

Same product: openbao
Same vendor: openbao
Same weakness: CWE-863

V. Comments for CVE-2026-71543

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