CVE-2026-93326: CWE-180: Incorrect Behavior Order: Validate Before Canonicalize in moby BuildKit
Description
CVE-2026-93326 is a medium severity vulnerability in moby BuildKit where a specially crafted Git build step can bypass some policy validation rules by making the repository appear to come from a different remote URL during Git clone. However, stricter validations based on commit SHA, commit data, or signatures remain effective.
CVSS v4.0
Score 6.0medium
Affected software
moby
BuildKit
pkg:github/github.com/moby/buildkitRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an incorrect behavior order (CWE-180) in moby BuildKit's handling of Git source build steps. A malicious build definition can manipulate the repository URL seen during Git clone, potentially bypassing some policy validation rules that rely on the repository URL. Despite this, validations that depend on commit SHA, commit data, or signatures are still correctly enforced, limiting the scope of the bypass.
Potential Impact
An attacker can craft a build step to make the repository appear as if it originates from a different remote URL, potentially bypassing URL-based policy validations. However, since commit SHA, commit data, and signature validations are still applied correctly, the impact is limited to scenarios relying solely on URL validation. There is no indication of remote code execution or data compromise solely from this vulnerability.
Mitigation Recommendations
No official patch or fix is currently documented. Users should rely on stricter validation policies that include commit SHA, commit data, or signature checks, as these are not bypassed by this vulnerability. Monitor vendor advisories for updates or patches addressing this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Docker
- Date Reserved
- 2026-09-17T17:18:44.985Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac4063a2cdf04f65634e08d
Added to database: 10/05/2026, 20:19:06 UTC
Last enriched: 10/05/2026, 20:33:48 UTC
Last updated: 10/05/2026, 20:34:04 UTC
Views: 3
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