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Vulnerability record · CVE-2026-34040 · published 31 March 2026

CVE-2026-34040: Docker engine authentication bypass via alternate path vulnerability

Docker · Engine

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.

7.8 CVSS 3.1 High EPSS 0.16% · top 95.1% CWE-288 · Authentication bypass via alternate path
7.8CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.1CVE-2026-33997Docker engine vulnerabilityMoby is an open source container framework. Prior to version 29.3.1, a security vulnerability has been detected that allows plugins privilege validat…EPSS 0.51%7.2CVE-2026-42306Docker engine toctou race condition vulnerabilityMoby is an open source container framework. In Docker Engine prior to version 29.5.1, Docker Daemon versions 28.5.2 and prior, and Moby Daemon prior …EPSS 0.10%6.1CVE-2026-41568Docker engine toctou race condition vulnerabilityMoby is an open source container framework. In Docker Engine prior to version 29.5.1, Docker Daemon versions 28.5.2 and prior, and Moby Daemon prior …EPSS 0.10%6.0CVE-2020-13401Docker engine improper input validation vulnerabilityAn issue was discovered in Docker Engine before 19.03.11. An attacker in a container, with the CAP_NET_RAW capability, can craft IPv6 router advertis…EPSS 2.8%4.9CVE-2018-20699Docker engine uncontrolled resource consumption vulnerabilityDocker Engine before 18.09 allows attackers to cause a denial of service (dockerd memory consumption) via a large integer in a --cpuset-mems or --cpu…EPSS 2.2%10.0CVE-2026-20079Cisco Secure Firewall Management Center authentication bypass to rootCisco Secure Firewall Management Center (FMC) Software contains an authentication bypass caused by an improper system process created at boot time. A…KEVEPSS 88%analysed9.3CVE-2026-19490Citrix NetScaler ADC and Gateway authentication bypass via alternate pathNetScaler ADC and NetScaler Gateway contain an authentication bypass via an alternate path or channel (CWE-288). The flaw is remotely reachable witho…KEVEPSS 7.0%analysed8.2CVE-2026-18556N-able N-central authentication bypass via alternate pathN-able N-central contains an authentication bypass (CWE-288) that lets an attacker reach protected functionality through an alternate path or channel…KEVEPSS 7.9%analysed

Source: NIST National Vulnerability Database (record CVE-2026-34040), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.