{"id":"CVE-2021-36213","aliases":["BIT-consul-2021-36213","GHSA-8h2g-r292-j8xh","GO-2022-0895"],"url":"https://o3.security/vulnerability/CVE-2021-36213","summary":"HashiCorp Consul L7 deny intention results in an allow action","details":"HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a single L7 application-aware intention deny action cancels out, causing the intention to incorrectly fail open, allowing L4 traffic. Fixed in 1.9.8 and 1.10.1.","published":"2021-07-17T18:15:07.820Z","modified":"2026-07-08T22:13:26.615448Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/hashicorp/consul","fixedVersion":"1.10.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://discuss.hashicorp.com/t/hcsec-2021-16-consul-s-application-aware-intentions-deny-action-fails-open-when-combined-with-default-deny-policy/26855"},{"type":"ADVISORY","url":"https://github.com/hashicorp/consul/releases/tag/v1.10.1"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-09"},{"type":"ADVISORY","url":"https://www.hashicorp.com/blog/category/consul"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T22:13:26.615448Z"}}