{"id":"DEBIAN-CVE-2026-73499","details":"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.","modified":"2026-09-19T22:47:24.304577422Z","published":"2026-08-12T22:17:17.130Z","upstream":["CVE-2026-73499"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-73499"}],"affected":[{"package":{"name":"etcd","ecosystem":"Debian:12","purl":"pkg:deb/debian/etcd?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.23-4","3.4.23-5","3.4.23-6","3.4.30-1","3.4.30-2","3.4.30-3","3.5.15-1","3.5.15-2","3.5.15-3","3.5.15-4","3.5.15-5","3.5.15-6","3.5.15-7","3.5.16-1","3.5.16-10","3.5.16-11","3.5.16-2","3.5.16-3","3.5.16-4","3.5.16-5","3.5.16-6","3.5.16-7","3.5.16-8","3.5.16-9","3.5.22-1","3.5.22-2","3.5.30-1~exp1","3.5.30-1~exp2","3.5.30-2","3.5.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73499.json"}},{"package":{"name":"etcd","ecosystem":"Debian:13","purl":"pkg:deb/debian/etcd?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.16-10","3.5.16-11","3.5.16-4","3.5.16-5","3.5.16-6","3.5.16-7","3.5.16-8","3.5.16-9","3.5.22-1","3.5.22-2","3.5.30-1~exp1","3.5.30-1~exp2","3.5.30-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73499.json"}},{"package":{"name":"etcd","ecosystem":"Debian:14","purl":"pkg:deb/debian/etcd?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.16-10","3.5.16-11","3.5.16-4","3.5.16-5","3.5.16-6","3.5.16-7","3.5.16-8","3.5.16-9","3.5.22-1","3.5.22-2","3.5.30-1~exp1","3.5.30-1~exp2","3.5.30-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73499.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}