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Vulnerability record · CVE-2026-15791 · published 21 July 2026

CVE-2026-15791: Mobyproject buildkit path traversal vulnerability

Mobyproject · Buildkit

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.

1.8 CVSS 4.0 Low EPSS 0.25% · top 85.3% CWE-22 · Path traversal
1.8CVSS 4.0 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
30 Jul 2026Last modified by NVD

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:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/moby/buildkit/security/advisories/GHSA-32pv-7hq5-qhwq Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-15791), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.