HashiCorp Consul and Consul Enterprise 1.9.0 through 1.10.0 default deny policy with a…
Priority LOW 36Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
EPSS 0.01685 77th percentileScored 2026-11-07
Fix Fixed github.com/hashicorp/consul (Go): 1.10.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | github.com/hashicorp/consul (Go) | before 1.10.1 | 1.10.1 | Patch available | GHSA-8h2g-r292-j8xh |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- github.com/hashicorp/consul (Go) Vendor— Affected before 1.10.1 Fixed in 1.10.1 Patch available GHSA-8h2g-r292-j8xh
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hashicorp:consul:*:*:*:*:-:*:*:* | 1.9.0 to before 1.9.8 | Vulnerable | HashiCorp |
| cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:* | 1.9.0 to before 1.9.8 | Vulnerable | HashiCorp |
| cpe:2.3:a:hashicorp:consul:*:*:*:*:-:*:*:* | 1.10.0 to before 1.10.1 | Vulnerable | HashiCorp |
| cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:* | 1.10.0 to before 1.10.1 | Vulnerable | HashiCorp |
- cpe:2.3:a:hashicorp:consul:*:*:*:*:-:*:*:* Versions 1.9.0 to before 1.9.8 Vulnerable ·HashiCorp
- cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:* Versions 1.9.0 to before 1.9.8 Vulnerable ·HashiCorp
- cpe:2.3:a:hashicorp:consul:*:*:*:*:-:*:*:* Versions 1.10.0 to before 1.10.1 Vulnerable ·HashiCorp
- cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:* Versions 1.10.0 to before 1.10.1 Vulnerable ·HashiCorp
Remediation
- Fix · GHSA-8h2g-r292-j8xh github.com/hashicorp/consul (Go) Fixed in 1.10.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36213
- 2026-10-03 Alias added: GHSA-8h2g-r292-j8xh
References
Advisory 5
- https://www.hashicorp.com/blog/category/consul
- https://github.com/hashicorp/consul/releases/tag/v1.10.1
- https://discuss.hashicorp.com/t/hcsec-2021-16-consul-s-application-aware-intentions-deny-action-fails-open-when-combined-with-default-deny-policy/26855
- GLSA-202208-09
- https://nvd.nist.gov/vuln/detail/CVE-2021-36213
More HashiCorp Consul vulnerabilities
- TI-2021-18437 HashiCorp Consul Enterprise before 1.8.17, 1.9.x before 1.9.11, and 1.10.x before 1.10.4… CVSS 3.1HIGH 8.8
- TI-2022-11698 HashiCorp Consul and Consul Enterprise up to 1.9.16, 1.10.9, and 1.11.4 may allow server… CVSS 3.1HIGH 7.5
- TI-2021-02215 An issue was discovered in GoGo Protobuf before 1.3.2. CVSS 3.1HIGH 8.6
- TI-2024-09286 Consul L7 Intentions Vulnerable To Headers Bypass CVSS 3.1HIGH 8.3
- TI-2023-02638 Consul Envoy Extension Downsteam Proxy Configuration By Upstream Service Owner CVSS 3.1HIGH 8.7
- TI-2022-03595 Consul Peering Imported Nodes/Services Leak CVSS 3.1HIGH 7.5
Sources
- CVE-2021-36213 · CVE Program
- CVE-2021-36213 · NVD
- FIRST EPSS
- GHSA-8h2g-r292-j8xh · GitHub Advisory Database · CC BY 4.0
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