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HIGH · 7.5

CVE-2026-15791

A crafted message in the BuildKit low-level build API can be used to remove the contents of the /tmp directory. The action that can normally be used to delete files inside the build container rootfs c...

Vulnerability Description

A crafted message in the BuildKit low-level build API can be used to remove the contents of the /tmp directory. The action that can normally be used to delete files inside the build container rootfs can escape into the real host temp directory.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
MobyprojectBuildkit< 0.31.2

Related Weaknesses (CWE)

CWE-22

References

FAQ

What is CVE-2026-15791?

CVE-2026-15791 is a vulnerability with a CVSS score of 7.5 (HIGH). A crafted message in the BuildKit low-level build API can be used to remove the contents of the /tmp directory. The action that can normally be used to delete files inside the build container rootfs c...

How severe is CVE-2026-15791?

CVE-2026-15791 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-15791?

Check the references section above for vendor advisories and patch information. Affected products include: Mobyproject Buildkit.