CVE-2026-92543 | BDVDB-2026-384206 Detail
DockerDocker Engine
Description#
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.
Impact#
Disclosure of registry credentials sent via X-Registry-Auth to an attacker-controlled host with an invalid certificate, or substitution of a trusted image tag with attacker-controlled manifest and layers in image store.
Weaknesses#
References#
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.