{"id":"GHSA-xg4h-6gfc-h4m8","revision":null,"records":[{"revision":"3378a0da490b47f6927ad5845cb4d76b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73499","aliases":[],"title":"etcd: Watch API authorization bypass via open-ended range requests","description":"etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.","state":0,"publishedAt":"2026-08-12T21:20:31.888+00:00","modifiedAt":"2026-08-14T22:19:59.624+00:00","affected":[{"ecosystem":"Vendor product","name":"etcd","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"etcd-io\",\n                    \"product\": \"etcd\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.5.33\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.6.0, < 3.6.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.7.0-alpha.0, < 3.7.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":7.1,"severity":"HIGH"}],"references":["https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8","https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41","https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed","https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae","https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7","https://github.com/etcd-io/etcd/releases/tag/v3.5.33","https://github.com/etcd-io/etcd/releases/tag/v3.6.14","https://github.com/etcd-io/etcd/releases/tag/v3.7.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73499","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73499","identifiers":["CVE-2026-73499"]},"retained":false,"historicalAffected":[]},{"revision":"c1ccd63976a44fa8880120b0382c433a","observedAt":"2026-10-25T15:19:09.409+00:00","statement":{"source":"nvd","id":"CVE-2026-73499","aliases":[],"title":"etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive …","description":"etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.","state":0,"publishedAt":"2026-08-12T22:17:17.13+00:00","modifiedAt":"2026-10-24T15:10:00.19+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7.1,"severity":"HIGH"}],"references":["https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41","https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed","https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae","https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7","https://github.com/etcd-io/etcd/releases/tag/v3.5.33","https://github.com/etcd-io/etcd/releases/tag/v3.6.14","https://github.com/etcd-io/etcd/releases/tag/v3.7.1","https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73499","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-863"],"productCriteria":[],"sourceDates":{"published":"2026-08-12T22:17:17.130","lastModified":"2026-10-24T15:10:00.190"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-73499","identifiers":["CVE-2026-73499"]},"retained":false,"historicalAffected":[]},{"revision":"cf13d040c14d47ab95ebe8f450744307","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-xg4h-6gfc-h4m8","aliases":["BIT-etcd-2026-73499","CVE-2026-73499","GO-2026-6114"],"title":"etcd: Watch API authorization bypass via open-ended range requests","description":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nA user granted READ permission on a single, exact key can use the Watch gRPC API with `clientv3.WithFromKey()` (an open-ended, \"from this key to the end of the keyspace\" watch) to receive watch events for every key lexicographically greater than or equal to their permitted key — not just the one key they were granted. \n\nThis is an authorization bypass in etcd's RBAC enforcement for the Watch API; Range/Get and DeleteRange requests are not affected. It only affects clusters with authentication enabled — clusters running without auth already allow unrestricted read access.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nThis vulnerability is patched in the following versions:\n\n- etcd 3.7.1\n- etcd 3.6.14\n- etcd 3.5.33\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nIf upgrading is not immediately possible, the following mitigations reduce exposure:\n\n- Audit READ grants. Any READ grant — even on one key — can be leveraged via Watch to read everything after it. Review who holds READ permissions and revoke/tighten any you wouldn't trust with full read access.\n- Restrict network access. Limit which hosts can reach etcd's client (gRPC) port via firewall rules or network policy, reducing who can attempt exploitation.\n\n### Reporter\n\n- Luis Toro ([@lobuhi](https://github.com/lobuhi) on Github)\n- Anthropic  and Adam Korczynski ([@AdamKorcz](https://github.com/AdamKorcz) on Github)","state":0,"publishedAt":"2026-07-24T22:38:22+00:00","modifiedAt":"2026-09-10T03:50:53.1659988+00:00","affected":[{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.7.0-alpha.0"},{"kind":"fixed","version":"3.7.1"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.6.0"},{"kind":"fixed","version":"3.6.14"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.5.33"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8","https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41","https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae","https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7","https://github.com/etcd-io/etcd","https://github.com/etcd-io/etcd/releases/tag/v3.5.33","https://github.com/etcd-io/etcd/releases/tag/v3.6.14","https://github.com/etcd-io/etcd/releases/tag/v3.7.1"],"sourceUrl":"https://github.com/advisories/GHSA-xg4h-6gfc-h4m8","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-xg4h-6gfc-h4m8","identifiers":["GHSA-xg4h-6gfc-h4m8","BIT-etcd-2026-73499","CVE-2026-73499","GO-2026-6114"]},"retained":false,"historicalAffected":[]},{"revision":"39bdc64af6b9499ba8907a176dfce707","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6114","aliases":["BIT-etcd-2026-73499","CVE-2026-73499","GHSA-xg4h-6gfc-h4m8"],"title":"Watch API authorization bypass in go.etcd.io/etcd/server/v3","description":"In go.etcd.io/etcd/server/v3 before 3.5.33, 3.6.14, and 3.7.1, an authenticated user with READ permission on a single key can bypass RBAC restrictions by initiating an open-ended range watch using clientv3.WithFromKey(). The Watch RPC handler normalized open-ended range ends prior to authorization checks, causing isWatchPermitted to evaluate the request as a single-key watch while the underlying watch stream received events for all keys lexicographically greater than or equal to the target key.","state":0,"publishedAt":"2026-08-18T16:38:10+00:00","modifiedAt":"2026-08-19T21:41:58.4449009+00:00","affected":[{"ecosystem":"Go","name":"go.etcd.io/etcd/server/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.5.33"},{"kind":"introduced","version":"3.6.0"},{"kind":"fixed","version":"3.6.14"},{"kind":"introduced","version":"3.7.0-alpha.0"},{"kind":"fixed","version":"3.7.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8","https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41","https://github.com/etcd-io/etcd/releases/tag/v3.5.33","https://github.com/etcd-io/etcd/releases/tag/v3.6.14","https://github.com/etcd-io/etcd/releases/tag/v3.7.1"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6114","license":"OSV · upstream source license applies","key":"osv:GO-2026-6114","identifiers":["GO-2026-6114","BIT-etcd-2026-73499","CVE-2026-73499","GHSA-xg4h-6gfc-h4m8"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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