CVE-2026-92543
Docker Engine insecure-registry fallback via malicious DNS responses
Reported by docker · Published October 7, 2026
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| docker | Amazon Linux | 25.0.18-1.amzn2023.0.1 |
| docker | Alpine | 29.8.2-r0 |
| Docker Engine | Docker | 29.8.2 |
| github.com/moby/moby/v2 | Moby | 2.0.0-beta.25 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Docker | Docker Engine | 0 |
| Moby | Moby | 0 |
| Docker | Docker Engine | 0 |
| wolfi | py3-docker | * |
| amazon:2023 | docker | 0 |
| Moby | Moby | 0 |
| alpine | docker | 0 |
| chainguard | py3-docker | * |
Timeline
- Oct 7, 2026 CVE Published
- Oct 7, 2026 CVE Updated
- Oct 8, 2026 EPSS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-92543
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curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
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