{"cve":"CVE-2026-73499","nvd":{"published":"2026-08-12T22:17:17.130","modified":"2026-10-24T15:10:00.190","status":"Awaiting Analysis","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.","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":7.1},"cvss_v3":null,"cwes":["CWE-863"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-24T16:53:35.584907681+00:00"},"epss":{"cve":"CVE-2026-73499","score":0.00663,"percentile":0.51407,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-xg4h-6gfc-h4m8","url":"https://osv.dev/vulnerability/GHSA-xg4h-6gfc-h4m8","summary":"etcd: Watch API authorization bypass via open-ended range requests","modified":"2026-09-10T03:50:53.165998795Z","packages":[{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","purl":"pkg:golang/go.etcd.io/etcd/v3","ranges":[">=3.7.0-alpha.0 <3.7.1"],"fixed":["3.7.1"]},{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","purl":"pkg:golang/go.etcd.io/etcd/v3","ranges":[">=3.6.0 <3.6.14"],"fixed":["3.6.14"]},{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","purl":"pkg:golang/go.etcd.io/etcd/v3","ranges":["<3.5.33"],"fixed":["3.5.33"]}]},{"id":"GO-2026-6114","url":"https://osv.dev/vulnerability/GO-2026-6114","summary":"Watch API authorization bypass in go.etcd.io/etcd/server/v3","modified":"2026-08-19T21:41:58.444900927Z","packages":[{"ecosystem":"Go","name":"go.etcd.io/etcd/server/v3","purl":"pkg:golang/go.etcd.io/etcd/server/v3","ranges":["<3.5.33",">=3.6.0 <3.6.14",">=3.7.0-alpha.0 <3.7.1"],"fixed":["3.5.33","3.6.14","3.7.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}