CVE-2026-33748BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner.
Updated under an hour ago ()
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It affects mobyproject buildkit. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
mobyproject buildkit mobyproject:buildkit | before 0.28.1 | NVD |
References
- https://docs.docker.com/build/concepts/context/#url-fragmentsproduct
- https://github.com/moby/buildkit/releases/tag/v0.28.1product, release-notes
- https://github.com/moby/buildkit/security/advisories/GHSA-4vrq-3vrq-g6ggmitigation, vendor-advisory
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.