Login Request a demo
High severity · published Mar 31, 2026
CVE-2026-34040
Moby: AuthZ plugin bypass with oversized request body
7.8
CVSS
9.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)9.1% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
moby · moby
< 29.3.1 · source: vendor
EN
Engine · Docker
before 29.3.1 · source: NVD
In the news
VulnerabilityHigh
Docker CVE-2026-34040 Lets Attackers Bypass Authorization and Gain Host Access
A high-severity security vulnerability has been disclosed in Docker Engine that could permit an attacker to bypass authorization plugins&nbsp;(AuthZ) under specific circumstances. The vulnerability, tracked&nbsp;as CVE-2026-34040 (CVSS score: 8.8), stems from an incomplete fix&nbsp;for CVE-2024-41110, a maximum-severity vulnerability in the same component that came to light in July&nbsp;2024. "
CVE-2026-34040CVE-2024-41110
Apr 7, 2026·The Hacker News
Affected product
MO
moby
moby
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34040
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34040
Release Notes
https://github.com/moby/moby/releases/tag/docker-v29.3.1
Vendor Advisory
https://github.com/moby/moby/security/advisories/GHSA-x744-4wpc-v9h2
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