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TI-2026-69247 Aliases CVE-2026-92543

Docker Engine skips certificate checks via malicious DNS answers

Priority LOW 34CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
High
Attack requirements
Present
Impact type
Spoofing, Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 1 fixed, 5 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-295 and CWE-319.

Summary

Docker Engine before 29.8.2 and Moby before v2.0.0-beta.25 classify a registry hostname as insecure if any address it resolves to falls in a default insecure range such as 127.0.0.0/8. Because the transport then dials the hostname instead of the matching address, a DNS answer that mixes a loopback IP with an attacker-controlled IP disables certificate verification and allows HTTP fallback for the registry connection (CWE-295). An attacker who controls DNS answers for a registry hostname can exploit this with user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00087 0th percentileScored 2026-11-07
Fix Partial Docker Engine (Docker): 29.8.2Moby (Moby): v2.0.0-beta.25Red Hat: 1 advisoryRed Hat: 1 fixed, 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DockerDocker Enginebefore 29.8.229.8.2Patch availableCNA
mobyMobybefore v2.0.0-beta.25v2.0.0-beta.25Patch availableCNA
  • Docker Engine VendorDocker Affected before 29.8.2 Fixed in 29.8.2 Patch available CNA
  • Moby Vendormoby Affected before v2.0.0-beta.25 Fixed in v2.0.0-beta.25 Patch available CNA

Remediation

Docker Engine should be updated to 29.8.2 and Moby to v2.0.0-beta.25. Red Hat fixes Multicluster Global Hub 1.7.4 in RHSA-2026:95517. Red Hat lists Multicluster Engine for Kubernetes, Red Hat Ceph Storage 5, 7 and 9, and Red Hat OpenShift Container Platform 4 as affected with no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Docker Engine (Docker) Fixed in 29.8.2
  • Fix · CNA Moby (Moby) Fixed in v2.0.0-beta.25

Red Hat 1 advisory

  • RHSA-2026:95517 Released 2026-11-05 · Red Hat rating Important
    Multicluster Global Hub 1.7.4 security update
    • Multicluster Global Hub 1.7.4 registry.redhat.io/multicluster-globalhub/multicluster-globalhub-agent-rhel9, registry.redhat.io/multicluster-globalhub/multicluster-globalhub-grafana-rhel9, registry.redhat.io/multicluster-globalhub/multicluster-globalhub-manager-rhel9 +1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Multicluster Engine for KubernetesAffectedNo fix yet
Red Hat Ceph Storage 5AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 7AffectedNo fix yet: Fix deferred
Red Hat Ceph Storage 9AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Multicluster Global Hub 1.7.4Fixed RHSA-2026:95517
Not affected: 6 products
  • Multicluster Global Hub 1.7.4
  • Red Hat Advanced Cluster Management for Kubernetes 2
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-92543
  2. 2026-10-07 CISA SSVC decision points changed
  3. 2026-10-07 Priority changed: MEDIUM → LOW
  4. 2026-10-08 Affected versions changed · Red Hat
  5. 2026-10-08 CVSS score added · Red Hat
  6. 2026-10-09 Affected versions changed · Red Hat
  7. 2026-10-10 Affected versions changed · Red Hat
  8. 2026-10-16 Affected versions changed · Red Hat
  9. 2026-10-27 Affected versions changed · Red Hat
  10. 2026-10-30 Affected versions changed · Red Hat
  11. 2026-11-03 Affected versions changed · Red Hat
  12. 2026-11-06 Fix available: Multicluster Global Hub 1.7.4 · Red Hat
  13. 2026-11-06 Fix available: RHSA-2026:95517 · Red Hat

References

Advisory 1

  • TI-2019-11833 Docker Desktop Community Edition before 2.1.0.1 allows local users to gain privileges by… KEVCVSS 3.1HIGH 7.8
  • TI-2019-04061 runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows… CVSS 3.1HIGH 8.6
  • TI-2025-08316 Docker Desktop allows unauthenticated access to Docker Engine API from containers CVSS 4.0CRITICAL 9.3
  • TI-2025-02823 Elevation of Privilege in Docker Desktop for Windows during Upgrade due to Insecure Directory Deletion CVSS 4.0HIGH 7.3
  • TI-2026-14229 Tar extraction in moby/go-archive can write outside the destination directory via link following CVSS 4.0HIGH 7.1
  • TI-2023-21271 Docker Machine through 0.16.2 allows an attacker, who has control of a worker node, to… CVSS 3.1MEDIUM 6.5
See all 132 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences