---
title: "CVE-2026-92543: Docker Engine - Authentication Bypass"
description: "Docker Engine contains a broken authentication caused by insecure DNS-based registry hostname classification, letting attackers bypass certificate verification and enable HTTP fallback, exploit requires attacker to control DNS responses."
url: https://panop.io/threat-heartbeat/CVE-2026-92543/
---

# CVE-2026-92543 Docker Engine - Authentication Bypass

Docker Engine contains a broken authentication caused by insecure DNS-based registry hostname classification, letting attackers bypass certificate verification and enable HTTP fallback, exploit requires attacker to control DNS responses.

CVSS base score 7.6 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.09% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-92543)

## Details

Type

Authentication Bypass

Impact

Man In The Middle

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

7 October 2026

Updated

15 October 2026

Weakness

[CWE-295](https://cwe.mitre.org/data/definitions/295.html)

## Vendor fix

Update to the latest Docker Engine version with improved registry hostname validation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-92543](https://nvd.nist.gov/vuln/detail/CVE-2026-92543)
- [https://github.com/moby/moby/security/advisories/GHSA-7cfq-22r6-qp73](https://github.com/moby/moby/security/advisories/GHSA-7cfq-22r6-qp73)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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