moby BuildKit up to 0.31.0 raw low-level API git.checkoutbundle os command injection

Summaryinfo

A vulnerability classified as very critical was found in moby BuildKit up to 0.31.0. Impacted is an unknown function of the component raw low-level API. Executing a manipulation of the argument git.checkoutbundle can lead to os command injection. This vulnerability appears as CVE-2026-15793. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in moby BuildKit up to 0.31.0. It has been declared as very critical. This vulnerability affects an unknown function of the component raw low-level API. The manipulation of the argument git.checkoutbundle with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

BuildKit custom frontends or clients using the raw low-level API can set git.checkoutbundle=true when checking out Git sources. If the Git source is malicious, this could lead to a crafted command invocation on the host.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-15793 since 07/14/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/21/2026). The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 0.31.1 eliminates this vulnerability.

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Productinfo

Vendor

• moby

Name

• BuildKit

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31.0

Website

• Product: https://github.com/moby/buildkit/

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