{"id":"CVE-2026-73499","title":"etcd is a distributed key-value store for the data of a distributed system","summary":"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 recei…","severity":"high","cwe":["CWE-863"],"vendor":"etcd","product":"go.etcd.io/etcd/v3","affected":["go.etcd.io/etcd/v3 >= 3.7.0-alpha.0, < 3.7.1","go.etcd.io/etcd/v3 >= 3.6.0, < 3.6.14","go.etcd.io/etcd/v3 < 3.5.33"],"patched":["go.etcd.io/etcd/v3 3.7.1","go.etcd.io/etcd/v3 3.6.14","go.etcd.io/etcd/v3 3.5.33"],"published":"2026-08-12","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:05:53.723","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73499","references":[{"url":"https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41","label":"security-advisories@github.com"},{"url":"https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed","label":"security-advisories@github.com"},{"url":"https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae","label":"security-advisories@github.com"},{"url":"https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7","label":"security-advisories@github.com"},{"url":"https://github.com/etcd-io/etcd/releases/tag/v3.5.33","label":"security-advisories@github.com"},{"url":"https://github.com/etcd-io/etcd/releases/tag/v3.6.14","label":"security-advisories@github.com"},{"url":"https://github.com/etcd-io/etcd/releases/tag/v3.7.1","label":"security-advisories@github.com"},{"url":"https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8","label":"security-advisories@github.com"},{"url":"https://github.com/etcd-io/etcd"}],"tags":["nvd","osv","go"],"epss":0.00365,"epssPercentile":0.30372,"aliases":["GHSA-xg4h-6gfc-h4m8"],"ecosystem":"go","ingestedAt":"2026-08-13T19:18:21.612Z","slug":"CVE-2026-73499","body":"## Overview\n\netcd 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-73499)\n\nAffected packages:\n\n- `go.etcd.io/etcd/v3 >= 3.7.0-alpha.0, < 3.7.1`\n- `go.etcd.io/etcd/v3 >= 3.6.0, < 3.6.14`\n- `go.etcd.io/etcd/v3 < 3.5.33`\n\nPatched in:\n\n- `go.etcd.io/etcd/v3 3.7.1`\n- `go.etcd.io/etcd/v3 3.6.14`\n- `go.etcd.io/etcd/v3 3.5.33`\n\nSource: https://osv.dev/vulnerability/GHSA-xg4h-6gfc-h4m8","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}