{"id":"CVE-2026-15972","aliases":["BIT-consul-2026-15972","DEBIAN-CVE-2026-15972","EUVD-2026-54612","GHSA-699f-92f5-m297","UBUNTU-CVE-2026-15972"],"status":"published","title":"Unauthenticated denial of service via unbounded external gRPC connection acceptance","description":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00549,"percentile":0.46215,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-08-07T19:20:22Z","modified":"2026-10-28T02:30:55Z","fixes":[{"ecosystem":"Bitnami","package":"consul","fixed_in":["2.0.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"consul","ranges":[{"type":"SEMVER","events":[{"introduced":"1.13.0"},{"fixed":"2.0.3"}]}]},{"source":"osv","ecosystem":"Debian:11","package":"consul","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"consul","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.4~dfsg-3"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"consul","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"consul","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.4+dfsg1-1","1.8.7+dfsg1-3"]}],"products":[{"vendor":"hashicorp","product":"consul"},{"vendor":"hashicorp","product":"consul enterprise"}],"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-25-multiple-vulnerabilities-impacting-hashicorp-consul/77629","tags":["web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15972","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-699f-92f5-m297"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15972.json","tags":["advisory"]},{"url":"https://github.com/hashicorp/consul","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-15972","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-15972","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-15972","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-15972","title":"Unauthenticated denial of service via unbounded external gRPC connection acceptance","description":"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.","status":"published","published":"2026-08-07T19:20:22.442Z","modified":"2026-08-10T18:24:14.625Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T13:47:39.876248Z"}],"euvd":[{"id":"EUVD-2026-54612","description":"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.","status":"published","published":"2026-08-07T19:20:22Z","modified":"2026-08-10T18:24:14Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:02:01.104981Z"}],"ghsa":[{"id":"GHSA-699f-92f5-m297","title":"Consul Community Edition and Consul Enterprise 1.13.0 through 2.0.2 are vulnerable to an...","description":"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.","status":"published","published":"2026-08-07T21:30:37Z","modified":"2026-08-07T21:30:40Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:10:12.306859Z"}],"nvd":[{"id":"CVE-2026-15972","description":"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.","status":"published","published":"2026-08-07T20:16:50.02Z","modified":"2026-08-28T15:47:00.217Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:35.743275Z"}],"osv":[{"id":"CVE-2026-15972","title":"Unauthenticated denial of service via unbounded external gRPC connection acceptance","description":"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.","status":"published","published":"2026-08-07T19:20:22.442Z","modified":"2026-10-28T02:30:55.251647255Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:44:57.682091Z"},{"id":"DEBIAN-CVE-2026-15972","description":"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.","status":"published","published":"2026-08-07T20:16:50.02Z","modified":"2026-08-29T08:47:39.457785815Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:52.562592Z"},{"id":"UBUNTU-CVE-2026-15972","description":"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.","status":"published","published":"2026-08-07T20:16:00Z","modified":"2026-08-13T00:02:18Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:00.592716Z"},{"id":"BIT-consul-2026-15972","title":"Unauthenticated denial of service via unbounded external gRPC connection acceptance","description":"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.","status":"published","published":"2026-08-17T05:38:03.657Z","modified":"2026-08-24T08:15:17.189758107Z","updated_at":"2026-11-02T15:28:28.70813Z"}]}}