CVE-2026-15972
CVE-2026-15972 · Unauthenticated denial of service via unbounded external gRPC connection acceptance
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.5 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
consul
- Versions
- ≥ 1.13.0, < 2.0.3: Affected (semver)
Update to 2.0.3
consul enterprise
- Versions
- ≥ 1.13.0, < 2.0.3: Affected; ≥ 1.21.17: Not affected; ≥ 1.22.11: Not affected (semver)
Update to 1.21.17
consul Debian:11
- Versions
- 1.10.12+dfsg1-1
- 1.8.7+dfsg1-2
- 1.8.7+dfsg1-3
- 1.8.7+dfsg1-4
- 1.8.7+dfsg1-5
- 1.8.7+dfsg1-6
- 1.9.17+dfsg2-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
consul Ubuntu:18.04:LTS
- Versions
- 0.6.4~dfsg-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
consul Ubuntu:20.04:LTS
- Versions
- 1.0.7~dfsg1-5ubuntu1
- 1.4.4~dfsg1-2ubuntu2
- 1.5.2+dfsg1-6
- 1.5.2+dfsg1-10
- 1.5.2+dfsg1-12
- 1.5.2+dfsg2-14
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
consul Ubuntu:22.04:LTS
- Versions
- 1.7.4+dfsg1-1
- 1.8.7+dfsg1-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published