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Vulnerability record · CVE-2026-15789 · published 21 July 2026

CVE-2026-15789: Mobyproject buildkit path traversal vulnerability

Mobyproject · Buildkit

A custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access the BuildKit control API to issue builds, e.g., bypass authentication, etc.

6.9 CVSS 4.0 Medium EPSS 0.31% · top 78.2% CWE-22 · Path traversal
6.9CVSS 4.0 base score
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
30 Jul 2026Last modified by NVD

Description

A custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access the BuildKit control API to issue builds, e.g., bypass authentication, etc.

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/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-g2h8-426c-7976 Vendor Advisory

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Related vulnerabilities

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

9.8CVE-2026-33747Mobyproject buildkit path traversal vulnerabilityBuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when …EPSS 0.58%9.8CVE-2024-23653Mobyproject buildkit incorrect authorization vulnerabilityBuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. In addition to running contain…EPSS 3.0%9.1CVE-2024-23652Mobyproject buildkit path traversal vulnerabilityBuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. A malicious BuildKit frontend …EPSS 2.1%8.2CVE-2026-33748Mobyproject buildkit path traversal vulnerabilityBuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, insuf…EPSS 0.53%7.4CVE-2024-23651Mobyproject buildkit race condition vulnerabilityBuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Two malicious build steps runn…EPSS 0.79%7.3CVE-2026-15793Mobyproject buildkit argument injection vulnerabilityBuildKit 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 …EPSS 0.35%6.5CVE-2023-26054Mobyproject buildkit information exposure vulnerabilityBuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. In affected versions when the …EPSS 1.0%6.0CVE-2026-15792Mobyproject buildkit improper input validation vulnerabilityA malicious BuildKit client or frontend could craft a request that could lead to BuildKit daemon crashing with a panic.EPSS 0.42%

Source: NIST National Vulnerability Database (record CVE-2026-15789), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.