HCSEC-2026-46 - Consul vulnerable to an authorization bypass in the agent's service mesh leaf certificate API
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HashiCorp Consul and Consul Enterprise versions 1.17.0 up to 2.0.4 have an authorization bypass in the agent's service mesh leaf certificate API allowing attackers to retrieve private keys.
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Bulletin ID: HCSEC-2026-46 Affected Products / Versions: Consul and Consul Enterprise 1.17.0 up to 2.0.4; fixed in Consul 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19 Publication Date: October 26, 2026 Summary HashiCorp Consul and Consul Enterprise 1.17.0 up to 2.0.4 are vulnerable to an authorization bypass in the agent’s service mesh leaf certificate API that may allow an attacker without a valid ACL token to retrieve a cached service leaf certificate and its private key. This vulnerability (