CVE-2026-34040

Moby: AuthZ plugin bypass with oversized request body

Published Mar 31, 2026 CVSS 3.1 · 8.8 High EPSS 9.3% KEV · Not listed
Description
Moby is an open source container framework. Prior to version 29.3.1, a security vulnerability has been detected that allows attackers to bypass authorization plugins (AuthZ). This issue has been patched in version 29.3.1.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6443-1 docker.io security update
Github GHSA Github GHSA GHSA-x744-4wpc-v9h2 Moby has AuthZ plugin bypass when provided oversized request bodies
History
Type Values Removed Values Added
First Time appeared Docker
Docker engine
CPEs cpe:2.3:a:mobyproject:moby:*:*:*:*:*:*:*:* cpe:2.3:a:docker:engine:*:*:*:*:*:*:*:*
Vendors & Products Mobyproject
Mobyproject moby
Docker
Docker engine
Type Values Removed Values Added
First Time appeared Mobyproject
Mobyproject moby
CPEs cpe:2.3:a:mobyproject:moby:*:*:*:*:*:*:*:*
Vendors & Products Mobyproject
Mobyproject moby
Type Values Removed Values Added
First Time appeared Moby
Moby moby
Vendors & Products Moby
Moby moby
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Moby is an open source container framework. Prior to version 29.3.1, a security vulnerability has been detected that allows attackers to bypass authorization plugins (AuthZ). This issue has been patched in version 29.3.1.
Title Moby: AuthZ plugin bypass with oversized request body
Weaknesses CWE-288
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Apr 2, 2026, 3:55 AM
Reserved
Mar 25, 2026, 3:29 PM
Status
Analyzed
Published
Mar 31, 2026, 3:15 AM
Modified
Jun 17, 2026, 10:38 AM
Severity
Moderate
Public date
Mar 31, 2026, 1:36 AM