Bug 2559295 (CVE-2026-115361)

Summary: CVE-2026-115361 github.com/openbao/openbao: OpenBao: Access control bypass via dropped templated policy denials
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenBao. When evaluating access control list (ACL) policies that combine broad wildcard permissions with specific identity-based denial rules, the application improperly drops explicit deny rules if the identity metadata includes wildcard or path segments. An authenticated user possessing matching identity metadata can exploit this issue to bypass access restrictions and access protected resources within the granted scope that should have been denied.
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Description OSIDB Bzimport 2026-10-22 20:17:18 UTC 
OpenBao before 2.6.3 contains an ACL bypass vulnerability that silently drops explicit deny rules based on forbidden identity metadata templates within wildcard grants. Attackers whose identity metadata contains wildcard or path segments can access paths that should be denied within the broader wildcard-granted scope.