High 8.2Published Mar 27, 2026

CVE-2026-33748BuildKit Git URL subdir component can cause access to restricted files

Updated under an hour ago (Oct 26, 2026, 6:23 AM ET)

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It affects moby buildkit and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for moby buildkit

Exploited in the last 30 days

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository root. Possible access is limited to files on the same mounted filesystem. The issue has been fixed in version v0.28.1 The issue affects only builds that use Git URLs with a subpath component. As a workaround, avoid building Dockerfiles from untrusted sources or using the subdir component from an untrusted Git repository where the subdir component could point to a symlink.

CVSS: 8.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-22, CWE-59
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

moby buildkit moby:buildkit (from the name)	before 0.28.1	CNA record
mobyproject buildkit mobyproject:buildkit	before 0.28.1	NVD

References

https://github.com/moby/buildkit/security/advisories/GHSA-4vrq-3vrq-g6ggx-refsource-confirm, mitigation, vendor-advisory
https://docs.docker.com/build/concepts/context/#url-fragmentsx-refsource-misc, product
https://github.com/moby/buildkit/releases/tag/v0.28.1x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.