CVE catalog
CVE-2026-33748
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 compo
- Severity
- High · CVSS 8.2
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/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:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.48% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | docker.io | sid | 28.5.2+dfsg4-5 | fixed |
| Debian | docker.io | forky | 28.5.2+dfsg4-5 | fixed |
| Debian | docker.io | trixie | 26.1.5+dfsg1-9+deb13u1 | fixed |
| Debian | docker.io | trixie-security | 26.1.5+dfsg1-9+deb13u1 | fixed |
| Debian | docker.io | bookworm | 20.10.24+dfsg1-1+deb12u1 | vulnerable |
| Cpe | docker.io-app | Not reported | 29.1.3-0ubuntu3~24.04.2 | fixed |
| Cpe | docker-doc | Not reported | 29.1.3-0ubuntu3~24.04.2 | fixed |
| Cpe | docker.io | Not reported | 29.1.3-0ubuntu3~24.04.2 | fixed |
| Cpe | docker.io | Not reported | Not reported | vulnerable |
| Cpe | buildkit | Not reported | 0.28.1 | fixed |
| Go | github.com/moby/buildkit | Not reported | 0.28.1 | fixed |
| Cpe | buildkit | Not reported | 0.28.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | docker.io | source | sid | 28.5.2+dfsg4-3 | not yet assigned | Not reported | [1140189] |
| Debian | docker.io | source | forky | 28.5.2+dfsg4-3 | not yet assigned | Not reported | [1140189] |
| Debian | docker.io | source | trixie | 26.1.5+dfsg1-9+deb13u1 | not yet assigned | Not reported | [1140189] |
| Debian | docker.io | source | bookworm | (unfixed) | not yet assigned | Not reported | [1140189] |
| Cpe | docker.io-app | cpe | Not reported | 29.1.3-0ubuntu3~24.04.2 | Not reported | Not reported | Not reported |
| Cpe | docker-doc | cpe | Not reported | 29.1.3-0ubuntu3~24.04.2 | Not reported | Not reported | Not reported |
| Cpe | docker.io | cpe | Not reported | 29.1.3-0ubuntu3~24.04.2 | Not reported | Not reported | Not reported |
| Cpe | buildkit | cpe | Not reported | 0.28.1 | Not reported | Not reported | Not reported |
| Go | github.com/moby/buildkit | Go | Not reported | 0.28.1 | Not reported | GHSA-4VRQ-3VRQ-G6GG | Not reported |
| Cpe | buildkit | cpe | Not reported | 0.28.1 | Not reported | NVD-CVE-2026-33748 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [docker-doc]Affected
Source package: [docker.io]
Details (2)
20.10.24+dfsg1-1+deb12u1· all · bookwormAffected
nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
20.10.24+dfsg1-1+deb12u1· all · bookwormAffected
nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
- [docker.io]Affected
Source package: [docker.io]
Details (2)
20.10.24+dfsg1-1+deb12u1+b6· amd64 · bookwormAffected
nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
20.10.24+dfsg1-1+deb12u1+b6· arm64 · bookwormAffected
nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
- [golang-github-docker-docker-dev]Affected
Source package: [docker.io]
Details (2)
20.10.24+dfsg1-1+deb12u1· all · bookwormAffected
nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
20.10.24+dfsg1-1+deb12u1· all · bookwormAffected
nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
[Debian 13 (Trixie)]
- [docker-cli]Affected
Source package: [docker.io]
Details (4)
26.1.5+dfsg1-9+b13· amd64 · trixieAffected · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+b13· arm64 · trixieAffected · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· amd64 · trixie-securityFixed · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· arm64 · trixie-securityFixed · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
- [docker-doc]Affected
Source package: [docker.io]
Details (4)
26.1.5+dfsg1-9· all · trixieAffected · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9· all · trixieAffected · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· all · trixie-securityFixed · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· all · trixie-securityFixed · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
- [docker.io]Affected
Details (4)
26.1.5+dfsg1-9+b13· amd64 · trixieAffected · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+b13· arm64 · trixieAffected · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· amd64 · trixie-securityFixed · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· arm64 · trixie-securityFixed · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
- [golang-github-docker-docker-dev]Affected
Source package: [docker.io]
Details (4)
26.1.5+dfsg1-9· all · trixieAffected · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9· all · trixieAffected · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· all · trixie-securityFixed · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
26.1.5+dfsg1-9+deb13u1· all · trixie-securityFixed · Fixed:
26.1.5+dfsg1-9+deb13u1nvd · docker.io · debian · 13
Observed:
References
- [https://docs.docker.com/build/concepts/context/#url-fragments]
- [https://ftp.suse.com/pub/projects/security/]
- [https://github.com/moby/buildkit/releases/tag/v0.28.1]
- [https://github.com/moby/buildkit/security/advisories/GHSA-4vrq-3vrq-g6gg]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-33748]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-33748]
- [https://osv.dev/vulnerability/GHSA-4vrq-3vrq-g6gg]
- [https://security-tracker.debian.org/tracker/CVE-2026-33748]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33748.json]
- [https://ubuntu.com/security/notices/USN-8230-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0873.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]