Docker/Moby Docker Engine Registry Hostname Validation loadInsecureRegistries certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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3.7$0-$5k1.28

Summaryinfo

A vulnerability described as problematic has been identified in Docker/Moby Docker Engine. Impacted is the function loadInsecureRegistries of the component Registry Hostname Validation. Such manipulation leads to certificate validation. This vulnerability is uniquely identified as CVE-2026-92543. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Docker/Moby Docker Engine (unknown version) and classified as problematic. Affected by this issue is the function loadInsecureRegistries of the component Registry Hostname Validation. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is integrity. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-92543 since 09/16/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/07/2026). The MITRE ATT&CK project declares the attack technique as T1587.003.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/16/2026 CVE reserved
10/07/2026 +21 days Advisory disclosed
10/07/2026 +0 days VulDB entry created
10/07/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-92543 (🔒)
GCVE (CVE): GCVE-0-2026-92543
GCVE (VulDB): GCVE-100-415112
scip Labs: https://www.scip.ch/en/?labs.20171019

Entryinfo

Created: 10/07/2026 19:24
Changes: 10/07/2026 19:24 (66)
Complete: 🔍
Cache ID: 216::103

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