CVE-2026-34040 PUBLISHED

Moby: AuthZ plugin bypass with oversized request body

Assigner: GitHub_M
Reserved: 25.03.2026 Published: 31.03.2026 Updated: 31.03.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Local	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	moby
Product	moby
Versions	Version < 29.3.1 is affected

References

https://github.com/moby/moby/security/advisories/GHSA-x744-4wpc-v9h2
https://github.com/moby/moby/releases/tag/docker-v29.3.1

Problem Types

CWE-288: Authentication Bypass Using an Alternate Path or Channel CWE