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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-88021

Consul vulnerable to an authorization bypass in the Connect service mesh

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Status
Published
Published
Updated
Assigning organization
HashiCorp

Description

Consul and Consul Enterprise are vulnerable to an authorization bypass in the Connect service mesh that may allow a service to reach a destination it is not authorized to access. When building Envoy RBAC rules to enforce Connect intentions, Consul did not correctly escape certain characters in service names, namespaces, and partitions, causing the generated authorization rules to match more broadly than intended. This vulnerability (CVE-2026-88021) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

HashiCorp Consul

Default version status: unaffected

  • 1.9.0 to < 2.0.4affected

HashiCorp Consul Enterprise

Default version status: unaffected

  • 1.9.0 to < 2.0.4affected

References