High severity · published Oct 7, 2026
CVE-2026-92543
Docker Engine insecure-registry fallback via malicious DNS responses
7.6
CVSS
0.1%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 0% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DE
Docker Engine · Docker
before 29.8.2 · source: vendor
MO
Moby · Moby
before v2.0.0-beta.25 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-92543
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-92543
vendor-advisory
https://github.com/moby/moby/security/advisories/GHSA-7cfq-22r6-qp73
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