Security Bulletin
Summary
Consul Community Edition and Consul Enterprise 1.3.0 through 2.0.2 are vulnerable to an unauthenticated denial of service in several agent HTTP API endpoints. A remote caller could cause the agent to consume substantial memory before the request was rejected. This vulnerability, CVE-2026-19113, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Vulnerability Details
CVEID: CVE-2026-19113
DESCRIPTION: Several agent API endpoints processed request content before performing ACL authorization, and no limit was applied to the size of that content. An unauthenticated caller could submit requests that caused the agent to consume memory before any authorization decision was made, even though the requests were ultimately rejected. Deployments that restrict network access to the Consul HTTP API to trusted clients, or that enforce mutual TLS client certificates on the HTTPS listener, reduce the exposure of this issue.
CWE: CWE-400: Uncontrolled Resource Consumption
CVSS Source: HashiCorp Inc.
CVSS Base score: 5.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| Consul Community Edition | affected from 1.3.0 up to 2.0.3 |
| Consul Enterprise | affected from 1.3.0 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 Yazdan Soltani.
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
ibm17283003