ubuntu-cve-2026-33747
Vulnerability from osv_ubuntu
Published
2026-04-22 00:00
Modified
2026-05-20 15:27
Summary
Details
BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.
Severity
8.4 (High)
9.8 (Critical)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "docker.io",
"binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
},
{
"binary_name": "golang-docker-dev",
"binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
},
{
"binary_name": "golang-github-docker-docker-dev",
"binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
},
{
"binary_name": "vim-syntax-docker",
"binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "docker.io",
"purl": "pkg:deb/ubuntu/docker.io@18.09.7-0ubuntu1~16.04.9+esm2?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.2~dfsg1-1ubuntu4",
"1.10.2-0ubuntu3",
"1.10.2-0ubuntu4",
"1.10.3-0ubuntu1",
"1.10.3-0ubuntu4",
"1.10.3-0ubuntu5",
"1.10.3-0ubuntu6",
"1.11.2-0ubuntu5~16.04",
"1.12.1-0ubuntu13~16.04.1",
"1.12.3-0ubuntu4~16.04.2",
"1.12.6-0ubuntu1~16.04.1",
"1.13.1-0ubuntu1~16.04.2",
"17.03.2-0ubuntu2~16.04.1",
"18.06.1-0ubuntu1~16.04.2",
"18.06.1-0ubuntu1.2~16.04.1",
"18.09.2-0ubuntu1~16.04.1",
"18.09.5-0ubuntu1~16.04.2",
"18.09.7-0ubuntu1~16.04.1",
"18.09.7-0ubuntu1~16.04.4",
"18.09.7-0ubuntu1~16.04.5",
"18.09.7-0ubuntu1~16.04.6",
"18.09.7-0ubuntu1~16.04.7",
"18.09.7-0ubuntu1~16.04.9+esm1",
"18.09.7-0ubuntu1~16.04.9+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "docker.io",
"binary_version": "20.10.21-0ubuntu1~18.04.3+esm3"
},
{
"binary_name": "golang-docker-dev",
"binary_version": "20.10.21-0ubuntu1~18.04.3+esm3"
},
{
"binary_name": "golang-github-docker-docker-dev",
"binary_version": "20.10.21-0ubuntu1~18.04.3+esm3"
},
{
"binary_name": "vim-syntax-docker",
"binary_version": "20.10.21-0ubuntu1~18.04.3+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "docker.io",
"purl": "pkg:deb/ubuntu/docker.io@20.10.21-0ubuntu1~18.04.3+esm3?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.13.1-0ubuntu6",
"17.03.2-0ubuntu1",
"17.03.2-0ubuntu3",
"17.03.2-0ubuntu5",
"17.12.1-0ubuntu1",
"18.06.1-0ubuntu1~18.04.1",
"18.06.1-0ubuntu1.2~18.04.1",
"18.09.2-0ubuntu1~18.04.1",
"18.09.5-0ubuntu1~18.04.2",
"18.09.7-0ubuntu1~18.04.1",
"18.09.7-0ubuntu1~18.04.3",
"18.09.7-0ubuntu1~18.04.4",
"19.03.6-0ubuntu1~18.04.1",
"19.03.6-0ubuntu1~18.04.2",
"19.03.6-0ubuntu1~18.04.3",
"20.10.2-0ubuntu1~18.04.2",
"20.10.2-0ubuntu1~18.04.3",
"20.10.7-0ubuntu1~18.04.1",
"20.10.7-0ubuntu1~18.04.2",
"20.10.7-0ubuntu5~18.04.2",
"20.10.7-0ubuntu5~18.04.3",
"20.10.12-0ubuntu2~18.04.1",
"20.10.21-0ubuntu1~18.04.2",
"20.10.21-0ubuntu1~18.04.3",
"20.10.21-0ubuntu1~18.04.3+esm1",
"20.10.21-0ubuntu1~18.04.3+esm2",
"20.10.21-0ubuntu1~18.04.3+esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-docker-dev",
"binary_version": "20.10.21-0ubuntu1~20.04.6+esm2"
},
{
"binary_name": "golang-github-docker-docker-dev",
"binary_version": "20.10.21-0ubuntu1~20.04.6+esm2"
},
{
"binary_name": "vim-syntax-docker",
"binary_version": "20.10.21-0ubuntu1~20.04.6+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "docker.io",
"purl": "pkg:deb/ubuntu/docker.io@20.10.21-0ubuntu1~20.04.6+esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"19.03.2-0ubuntu1",
"19.03.6-0ubuntu1",
"19.03.8-0ubuntu1",
"19.03.8-0ubuntu1.20.04",
"19.03.8-0ubuntu1.20.04.1",
"19.03.8-0ubuntu1.20.04.2",
"20.10.2-0ubuntu1~20.04.2",
"20.10.2-0ubuntu1~20.04.3",
"20.10.7-0ubuntu1~20.04.1",
"20.10.7-0ubuntu1~20.04.2",
"20.10.7-0ubuntu5~20.04.1",
"20.10.7-0ubuntu5~20.04.2",
"20.10.12-0ubuntu2~20.04.1",
"20.10.21-0ubuntu1~20.04.1",
"20.10.21-0ubuntu1~20.04.2",
"20.10.21-0ubuntu1~20.04.4",
"20.10.21-0ubuntu1~20.04.5",
"20.10.21-0ubuntu1~20.04.6",
"20.10.21-0ubuntu1~20.04.6+esm1",
"20.10.21-0ubuntu1~20.04.6+esm2"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "docker.io",
"binary_version": "26.1.3-0ubuntu1~20.04.1+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "docker.io-app",
"purl": "pkg:deb/ubuntu/docker.io-app@26.1.3-0ubuntu1~20.04.1+esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "26.1.3-0ubuntu1~20.04.1+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"20.10.25-0ubuntu1~20.04.1",
"20.10.25-0ubuntu1~20.04.2",
"24.0.5-0ubuntu1~20.04.1",
"24.0.7-0ubuntu2~20.04.1",
"26.1.3-0ubuntu1~20.04.1",
"26.1.3-0ubuntu1~20.04.1+esm1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "docker.io",
"binary_version": "29.1.3-0ubuntu3~22.04.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "docker.io-app",
"purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~22.04.2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "29.1.3-0ubuntu3~22.04.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"20.10.25-0ubuntu1~22.04.1",
"20.10.25-0ubuntu1~22.04.2",
"24.0.5-0ubuntu1~22.04.1",
"24.0.7-0ubuntu2~22.04.1",
"26.1.3-0ubuntu1~22.04.1",
"27.5.1-0ubuntu3~22.04.1",
"27.5.1-0ubuntu3~22.04.2",
"28.2.2-0ubuntu1~22.04.1",
"29.1.3-0ubuntu3~22.04.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-docker-dev",
"binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
},
{
"binary_name": "golang-github-docker-docker-dev",
"binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
},
{
"binary_name": "vim-syntax-docker",
"binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "docker.io",
"purl": "pkg:deb/ubuntu/docker.io@20.10.21-0ubuntu1~22.04.8+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"20.10.7-0ubuntu5",
"20.10.7-0ubuntu7",
"20.10.12-0ubuntu1",
"20.10.12-0ubuntu2",
"20.10.12-0ubuntu3",
"20.10.12-0ubuntu3+gke1.24.1",
"20.10.12-0ubuntu4",
"20.10.21-0ubuntu1~22.04.2",
"20.10.21-0ubuntu1~22.04.3",
"20.10.21-0ubuntu1~22.04.5",
"20.10.21-0ubuntu1~22.04.6",
"20.10.21-0ubuntu1~22.04.7",
"20.10.21-0ubuntu1~22.04.7+esm1",
"20.10.21-0ubuntu1~22.04.7+esm2",
"20.10.21-0ubuntu1~22.04.8",
"20.10.21-0ubuntu1~22.04.8+esm1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "docker.io",
"binary_version": "29.1.3-0ubuntu3~24.04.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "docker.io-app",
"purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~24.04.2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "29.1.3-0ubuntu3~24.04.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"24.0.5-0ubuntu1",
"24.0.7-0ubuntu1",
"24.0.7-0ubuntu2",
"24.0.7-0ubuntu3",
"24.0.7-0ubuntu4",
"24.0.7-0ubuntu4.1",
"26.1.3-0ubuntu1~24.04.1",
"27.5.1-0ubuntu3~24.04.1",
"27.5.1-0ubuntu3~24.04.2",
"28.2.2-0ubuntu1~24.04.1",
"29.1.3-0ubuntu3~24.04.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-docker-docker-dev",
"binary_version": "20.10.25+dfsg1-2ubuntu1.24.04.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "docker.io",
"purl": "pkg:deb/ubuntu/docker.io@20.10.25+dfsg1-2ubuntu1.24.04.1+esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"20.10.24+dfsg1-1ubuntu2",
"20.10.25+dfsg1-2ubuntu1",
"20.10.25+dfsg1-2ubuntu1+esm1",
"20.10.25+dfsg1-2ubuntu1+esm2",
"20.10.25+dfsg1-2ubuntu1.24.04.1",
"20.10.25+dfsg1-2ubuntu1.24.04.1+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-docker-docker-dev",
"binary_version": "26.1.5+dfsg1-9ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "docker.io",
"purl": "pkg:deb/ubuntu/docker.io@26.1.5+dfsg1-9ubuntu1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"26.1.5+dfsg1-9ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "docker.io",
"binary_version": "29.1.3-0ubuntu3~25.10.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "docker.io-app",
"purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~25.10.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"27.5.1-0ubuntu3",
"27.5.1-0ubuntu4",
"28.2.2-0ubuntu1",
"29.1.3-0ubuntu3~25.10.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-docker-docker-dev",
"binary_version": "27.5.1+dfsg4-2ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "docker.io",
"purl": "pkg:deb/ubuntu/docker.io@27.5.1+dfsg4-2ubuntu1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"26.1.5+dfsg1-9ubuntu1",
"27.5.1+dfsg4-1ubuntu1",
"27.5.1+dfsg4-2ubuntu1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "docker.io",
"binary_version": "29.1.3-0ubuntu4.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "docker.io-app",
"purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu4.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "29.1.3-0ubuntu4.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"28.2.2-0ubuntu1",
"29.1.2-0ubuntu1",
"29.1.3-0ubuntu1",
"29.1.3-0ubuntu2",
"29.1.3-0ubuntu3",
"29.1.3-0ubuntu4"
]
}
],
"aliases": [],
"details": "BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with `#syntax` or `--build-arg BUILDKIT_SYNTAX`. Using these options with a well-known frontend image like `docker/dockerfile` is not affected.",
"id": "UBUNTU-CVE-2026-33747",
"modified": "2026-05-20T15:27:22Z",
"published": "2026-04-22T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-33747"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-33747"
},
{
"type": "REPORT",
"url": "https://github.com/moby/buildkit/releases/tag/v0.28.1"
},
{
"type": "REPORT",
"url": "https://github.com/moby/buildkit/security/advisories/GHSA-4c29-8rgm-jvjj"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8230-1"
}
],
"related": [
"USN-8230-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-33747"
]
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
Loading…
Loading…