CVE-2026-15793 Git source checkout from a bundle file could lead to command injection
Attackers can execute arbitrary commands on the host by providing a malicious Git bundle when the checkout bundle feature is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-15793?
CVE-2026-15793 is a medium-severity command injection vulnerability in moby BuildKit, published on 21 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-88
Which versions are affected by CVE-2026-15793?
It affects 1 product.
Products include Mobyproject Buildkit.
How do I fix CVE-2026-15793?
No fix has been published for CVE-2026-15793 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-15793 being exploited?
There is no known exploitation of CVE-2026-15793 in the wild and no public exploit code.
Other vulnerabilities in moby BuildKit
- CVE-2024-23652 BuildKit possible host system access from mount stub cleaner
- CVE-2024-23653 BuildKit interactive containers API does not validate entitlements check
- CVE-2024-23651 BuildKit possible race condition with accessing subpaths from cache mounts
- CVE-2026-33747 BuildKit vulnerable to malicious frontend causing file escape outside of storage root
- CVE-2026-33748 BuildKit Git URL subdir component can cause access to restricted files
Sources
Also known as GHSA-hw3h-2gp9-cxpv, UBUNTU-CVE-2026-15793.