Bug 2560988 (CVE-2026-105608)

Summary: CVE-2026-105608 github.com/hashicorp/consul: Consul: Authorization bypass via service mesh proxy registration
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: lchilton, rhel-process-autobot, sfeifer, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in HashiCorp Consul. An authenticated user with service write permissions can bypass authorization controls during service mesh proxy registration. By applying custom Envoy proxy configurations without possessing required mesh write privileges, an attacker can alter proxy settings beyond their authorized scope, leading to privilege escalation.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-26 18:06:24 UTC
HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in service mesh proxy registration. This may allow a user with service write permission to apply Envoy escape-hatch configuration without the required mesh write permission. This vulnerability (CVE-2026-105608) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.