{"id":"CVE-2026-70452","summary":"rsync 3.1.0 \u003c 3.5.0 Access Control Bypass via DNS Resolution Failure","details":"rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent hosts deny rules by inducing DNS resolution failures during hostname-based access control evaluation. When a DNS lookup for a hostname-based deny rule fails, the daemon skips the rule rather than defaulting to a deny decision, enabling attackers who can trigger DNS failures to bypass module-level IP access controls and gain unauthorized access to restricted module file trees.","aliases":["GHSA-6692-28cx-wpqq"],"modified":"2026-09-10T18:26:51.101493141Z","published":"2026-08-13T14:46:50.541Z","related":["SUSE-SU-2026:23253-1","SUSE-SU-2026:23254-1","SUSE-SU-2026:23289-1","SUSE-SU-2026:23323-1","SUSE-SU-2026:3634-1","SUSE-SU-2026:3657-1","openSUSE-SU-2026:21650-1"],"database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-636","CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70452.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70452.json"},{"type":"ADVISORY","url":"https://github.com/RsyncProject/rsync/releases/tag/v3.5.0"},{"type":"ADVISORY","url":"https://github.com/RsyncProject/rsync/security/advisories/GHSA-6692-28cx-wpqq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70452"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/rsync-access-control-bypass-via-dns-resolution-failure"},{"type":"PACKAGE","url":"https://github.com/RsyncProject/rsync"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rsyncproject/rsync","events":[{"introduced":"bc58313bf7f42f0993f7279299e8137e0f14f01c"},{"fixed":"471e17dc0d68233db84db11be82c9f62f4661214"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"3.1.0"},{"last_affected":"3.4.4"},{"fixed":"3.5.0"}]}}],"versions":["v3.4.3","v3.4","v3.2.7","v3.4.1","v3.4.2","v3.4.0","v3.3.0","v3.3.0pre1","v3.2.7pre1","v3.2.6","v3.2.5","v3.2.5pre2","v3.2.5pre1","v3.2.4","v3.2.4pre4","v3.2.4pre3","v3.2.4pre2","v3.2.4pre1","v3.2.3","v3.2.3pre1","v3.2.2","v3.2.2pre3","v3.2.2pre2","v3.2.2pre1","v3.2.1","v3.2.1pre1","v3.2.0","v3.2.0pre3","v3.2.0pre2","v3.2.0pre1","v3.1.3","v3.1.3pre1","v3.1.2","v3.1.2pre1","v3.1.1","v3.1.1pre2","v3.1.1pre1","v3.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70452.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}