GitHub Advisoryadvisory · Go
GHSA-x744-4wpc-v9h2 Moby has AuthZ plugin bypass when provided oversized request bodies
HIGH
Official page ↗
- Aliases
- CVE-2026-34040
- Ecosystem
- Go
- Packages
- github.com/moby/moby, github.com/moby/moby/v2
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-288, CWE-863
- Reviewed
- 2026-03-27
Affected packages
• Go github.com/moby/moby: < 29.3.1 → fixed in 29.3.1
• Go github.com/moby/moby/v2: < 2.0.0-beta.8 → fixed in 2.0.0-beta.8
Description
Summary
A security vulnerability has been detected that allows attackers to bypass authorization plugins (AuthZ) under specific circumstances. The base likelihood of this being exploited is low.
This is an incomplete fix for CVE-2024-41110.
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)
• Cody ([email protected])
• Asim Viladi Oglu Manizada (@manizada)
Resources
• CVE-2024-41110 / GHSA-v23v-6jw2-98fq
Related
Alias · CVE (1)
- CVE-2026-34040 Moby is an open source container framework. vulnerability
References
- https://github.com/moby/moby/security/advisories/GHSA-v23v-6jw2-98fq web
- https://github.com/moby/moby/security/advisories/GHSA-x744-4wpc-v9h2 web
- https://nvd.nist.gov/vuln/detail/CVE-2026-34040 advisory
- https://github.com/moby/moby/commit/e89edb19ad7de0407a5d31e3111cb01aa10b5a38 web
- https://docs.docker.com/engine/extend/plugins_authorization web
- https://github.com/moby/moby package
- https://github.com/moby/moby/releases/tag/docker-v29.3.1 web