Resource exhaustion in Hashicorp Consul
CVE-2026-15972
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.
EPSS: 0.004 (32.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Hashicorp Consul — versions 1.13.0
- Hashicorp Consul Enterprise — versions 1.13.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-15972?
- CVE-2026-15972 is a high-severity vulnerability in Hashicorp Consul, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-08-07.
- How severe is CVE-2026-15972?
- High severity. CVSS v3 base score is 7.5 out of 10.