CVE-2026-15972
Unauthenticated denial of service via unbounded external gRPC connection acceptance
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Consul Community Edition and Consul Enterprise 1.13.0 through 2.0.2 are vulnerable to an unauthenticated denial of service through unbounded connection acceptance on the external gRPC listeners. A remote attacker may exhaust agent file descriptors, goroutines, and memory by opening many incomplete connections, potentially preventing legitimate clients from connecting. This vulnerability, CVE-2026-15972, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
| CWE | CWE-770 |
| Vendor | hashicorp |
| Product | consul |
| Published | Aug 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
HashiCorp / Consul
1.13.0 < 2.0.3
HashiCorp / Consul Enterprise
1.13.0 < 2.0.3
References
Credits
This issue was reported by Erichen.