CVE-2026-34040

HIGH
2026-03-27 https://github.com/moby/moby GHSA-x744-4wpc-v9h2
8.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 27, 2026 - 18:00 vuln.today
Patch Released
Mar 27, 2026 - 18:00 nvd
Patch available
CVE Published
Mar 27, 2026 - 17:43 nvd
HIGH 8.8

Description

## Summary A security vulnerability has been detected that allows attackers to bypass [authorization plugins (AuthZ)](https://docs.docker.com/engine/extend/plugins_authorization/) under specific circumstances. The base likelihood of this being exploited is low. This is an incomplete fix for [CVE-2024-41110](https://github.com/moby/moby/security/advisories/GHSA-v23v-6jw2-98fq). ## Impact **If you don't use AuthZ plugins, you are not affected.** Using a specially-crafted API request, an attacker could make the Docker daemon forward the request to an authorization plugin without the body. The authorization plugin may allow a request which it would have otherwise denied if the body had been forwarded to it. Anyone who depends on authorization plugins that introspect the request body to make access control decisions is potentially impacted. ## Workarounds If unable to update immediately: - Avoid using AuthZ plugins that rely on request body inspection for security decisions. - Restrict access to the Docker API to trusted parties, following the principle of least privilege. ## Credits - 1seal / Oleh Konko ([@1seal](https://github.com/1seal)) - Cody ([email protected]) - Asim Viladi Oglu Manizada (@manizada) ## Resources - [CVE-2024-41110 / GHSA-v23v-6jw2-98fq](https://github.com/moby/moby/security/advisories/GHSA-v23v-6jw2-98fq)

Analysis

Docker daemon allows authorization plugin bypass through specially-crafted API requests that strip request bodies before forwarding to authorization (AuthZ) plugins, enabling attackers with low-level privileges to circumvent access controls. This vulnerability (CVSS 8.8) affects moby/moby and docker/docker packages, representing an incomplete fix for CVE-2024-41110. …

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Remediation

Within 24 hours: Identify all Docker daemon instances in production using 'docker version' and 'docker info' commands; cross-reference installed versions against vendor advisory. Within 7 days: Apply vendor-released patch via GitHub commit e89edb19ad7de0407a5d31e3111cb01aa10b5a38 to all Docker daemon hosts; test in staging environment before production rollout. …

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Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +44
POC: 0

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CVE-2026-34040 vulnerability details – vuln.today

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