{"cve":"CVE-2026-44283","nvd":{"published":"2026-05-14T18:16:49.650","modified":"2026-06-17T10:50:26.340","status":"Analyzed","description":"etcd is a distributed key-value store for the data of a distributed system. Prior to 3.4.44, 3.5.30, and 3.6.11, a vulnerability in etcd allows read access via PrevKv, or lease attachment in Put requests within transaction operations, to bypass RBAC authorization checks. An authenticated user without sufficient read or lease-related permissions may be able to access unauthorized data or attach leases by invoking transaction operations with these features enabled. This vulnerability is fixed in 3.4.44, 3.5.30, and 3.6.11.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-863"],"references":["https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5"],"products":["etcd:etcd"],"source":"nvd","synced_at":"2026-10-19T22:35:16.954578616+00:00"},"epss":{"cve":"CVE-2026-44283","score":0.00225,"percentile":0.13168,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-x35m-3gp4-4fh5","url":"https://osv.dev/vulnerability/GHSA-x35m-3gp4-4fh5","summary":"etcd RBAC bypass allows unauthorized data access via PrevKv/lease attachment in nested transaction Put requests","modified":"2026-09-10T03:51:07.211759765Z","packages":[{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","purl":"pkg:golang/go.etcd.io/etcd/v3","ranges":[">=3.6.0 <3.6.11"],"fixed":["3.6.11"]},{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","purl":"pkg:golang/go.etcd.io/etcd/v3","ranges":[">=3.5.0 <3.5.30"],"fixed":["3.5.30"]},{"ecosystem":"Go","name":"go.etcd.io/etcd","purl":"pkg:golang/go.etcd.io/etcd","ranges":["<3.4.44"],"fixed":["3.4.44"]}]},{"id":"GO-2026-5736","url":"https://osv.dev/vulnerability/GO-2026-5736","summary":"Etcd RBAC bypass via PrevKv/lease in nested transactions in go.etcd.io/etcd/v3 in go.etcd.io/etcd/server","modified":"2026-07-25T15:44:46.961229468Z","packages":[{"ecosystem":"Go","name":"go.etcd.io/etcd/server/v3","purl":"pkg:golang/go.etcd.io/etcd/server/v3","ranges":[">=3.5.0 <3.5.30",">=3.6.0 <3.6.11"],"fixed":["3.5.30","3.6.11"]}]}],"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."]}