Security Bulletin
Summary
Consul Community Edition and Consul Enterprise 1.20.1 through 2.0.2 are vulnerable to an L7 intention authorization bypass when a service proxy is configured with a custom public listener. An authenticated mesh workload may reach HTTP paths that are blocked by a path-based deny intention. This vulnerability, CVE-2026-15970, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Vulnerability Details
CVEID: CVE-2026-15970
DESCRIPTION: When Consul generates xDS configuration for a service using a custom public listener, it injected the L7 intention enforcement filter but did not apply the same HTTP request normalization settings used by standard listeners. As a result, path-based intention rules on custom listeners could be evaluated against requests in a form that allowed them to be bypassed. An authenticated mesh workload that is already permitted to connect to the destination service may exploit this to reach paths that are blocked by a deny intention. Only services configured with envoy_public_listener_json and path-based L7 deny intentions are affected; services using the standard listener configuration are not affected.
CWE: CWE-647: Non-Canonical URL Authorization
CVSS Source: HashiCorp Inc.
CVSS Base score: 4.2
CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| Consul Community Edition | affected from 1.20.1 up to 2.0.3 |
| Consul Enterprise | affected from 1.20.1 up to 2.0.3, unaffected from 1.21.17, 1.22.11 |
Remediation/Fixes
Customers should evaluate the risk associated with this issue and consider upgrading to Consul 2.0.3 or Consul Enterprise 1.21.17, 1.22.11, or 2.0.3.
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References
Acknowledgement
This issue was reported by Erichen.
Change History
07 Aug 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
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Document Location
Worldwide
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Document Information
Modified date:
07 August 2026
Initial Publish date:
07 August 2026
UID
ibm17283000