{"id":"CVE-2026-92543","summary":"Docker Engine insecure-registry fallback via malicious DNS responses","details":"Docker Engine classifies a registry hostname as insecure using an any-match DNS check. loadInsecureRegistries() injects 127.0.0.0/8 and ::1/128 as insecure CIDRs by default. isCIDRMatch resolves all of the hostname's addresses and returns true if a single address is in the insecure CIDR list. Because the transport re-dials the hostname rather than the CIDR-matching address, a DNS answer set of one loopback IP plus a non-loopback attacker IP disables certificate verification and enables HTTP fallback for the registry connection.","aliases":["GHSA-7cfq-22r6-qp73"],"modified":"2026-10-08T10:30:52.948315653Z","published":"2026-10-07T16:44:21.237Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92543.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"v2.0.0-beta.25"}]}],"cna_assigner":"Docker","cwe_ids":["CWE-295","CWE-319"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92543.json"},{"type":"ADVISORY","url":"https://github.com/moby/moby/security/advisories/GHSA-7cfq-22r6-qp73"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92543"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/moby/moby","events":[{"introduced":"0"},{"fixed":"8af9fe3a36bab3e039862a2ab1cef1880c9b4d03"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"29.8.2"}],"source":"AFFECTED_FIELD"}}],"versions":["docker-v29.6.2","docker-v29.6.1","docker-v29.4.3","docker-v29.4.2","v2.0.0-beta.8","docker-v29.3.1","docker-v29.1.5","docker-v29.1.4","docker-v29.1.3","docker-v29.0.4","docker-v29.0.3","docker-v29.0.2","docker-v29.0.1","v2.0.0-beta.3","docker-v29.0.0","client/v0.1.0","api/v1.52.0","v2.0.0-beta.2","docker-v29.0.0-rc.3","client/v0.1.0-rc.1","api/v1.52.0-rc.1","v2.0.0-beta.1","docker-v29.0.0-rc.2","client/v0.1.0-beta.3","api/v1.52.0-beta.4","docker-v29.0.0-rc.1","api/v1.52.0-beta.3","client/v0.1.0-beta.2","client/v0.1.0-beta.1","api/v1.52.0-beta.2","v2.0.0-beta.0","client/v0.1.0-beta.0","api/v1.52.0-beta.1","api/v1.52.0-beta.0","client/v0.1.0-alpha.0","api/v1.52.0-alpha.1","api/v1.52.0-alpha.0","v28.2.2","v28.2.1","v28.2.0","v28.2.0-rc.2","v28.2.0-rc.1","v28.1.1","v28.1.0-rc.2","v28.1.0","v28.1.0-rc.1","v28.0.4","v28.0.3","v28.0.2","v28.0.1","v28.0.0","v28.0.0-rc.3","v28.0.0-rc.2","v28.0.0-rc.1","v27.0.1","v27.0.1-rc.1","v27.0.0-rc.2","v27.0.0-rc.1","v26.1.0","v26.0.0","v26.0.0-rc3","v26.0.0-rc2","v26.0.0-rc1","v25.0.0","v25.0.0-rc.3","v25.0.0-rc.2","v25.0.0-rc.1","v25.0.0-beta.3","v25.0.0-beta.2","v25.0.0-beta.1","v24.0.0-rc.1","v24.0.0-rc.2","v24.0.0-beta.2","v24.0.0-beta.1","v22.06.0-beta.0","v20.10.2","v20.10.1","v20.10.0","v20.10.0-rc2","v20.10.0-rc1","v20.10.0-beta1","v19.03.0-beta3","v19.03.0-beta2","v19.03.0-beta1","v18.09.0-ce-tp0","v18.06.0-ce-rc1","docs-v1.12.0-rc4-2016-07-15","v0.7.2","v0.7.1","v0.7.0","v0.6.5","v0.5.0","v0.4.7","v0.4.5","v0.4.4","v0.4.2","v0.4.1","v0.3.2","v0.3.1","v0.3.0","v0.2.2","v0.2.1","v0.2.0","v0.1.8","v0.1.7","v0.1.6","v0.1.5","v0.1.4","v0.1.3","v0.1.2","v0.1.1","v0.1.0","upstream/0.1.3","0.0.3","upstream/0.1.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92543.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}