HIGH 7.6 NVD

CVE-2026-92543

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 CIDR

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.

References

https://github.com/moby/moby/security/advisories/GHSA-7cfq-22r6-qp73

Published: 2026-10-07 · Source: NVD · Feed updated: 2026-10-12

This high severity vulnerability with a CVSS score of 7.6 was published on 2026-10-07 via NVD.

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