ubuntu-cve-2026-52726
Vulnerability from osv_ubuntu
Published
2026-06-10 23:16
Modified
2026-06-17 04:30
Summary
Details
Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.23.2 and prior to version 1.2.5, dulwich.porcelain.submodule_update, and by extension porcelain.clone(..., recurse_submodules=True), materializes attacker-controlled submodule paths from a crafted upstream repository without path validation. A malicious .gitmodules plus a matching tree gitlink whose path is .git/hooks (or any other directory inside the parent repository's .git directory) causes the attacker's submodule tree contents to be written directly into the victim's .git/hooks/ directory, preserving executable mode bits. The dropped executables are then run by any subsequent git or dulwich command that invokes the matching hook, resulting in arbitrary code execution. This is the dulwich equivalent of the upstream Git fixes for CVE-2024-32002 / CVE-2024-32004, which were never propagated into dulwich's separately implemented submodule porcelain. Version 1.2.5 patches the issue.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "pypy-dulwich",
"binary_version": "0.12.0-1build2"
},
{
"binary_name": "python-dulwich",
"binary_version": "0.12.0-1build2"
},
{
"binary_name": "python3-dulwich",
"binary_version": "0.12.0-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "dulwich",
"purl": "pkg:deb/ubuntu/dulwich@0.12.0-1build2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.11.2-1ubuntu1",
"0.12.0-1",
"0.12.0-1build1",
"0.12.0-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "pypy-dulwich",
"binary_version": "0.18.5-1"
},
{
"binary_name": "python-dulwich",
"binary_version": "0.18.5-1"
},
{
"binary_name": "python3-dulwich",
"binary_version": "0.18.5-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "dulwich",
"purl": "pkg:deb/ubuntu/dulwich@0.18.5-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.18.2-1build1",
"0.18.5-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "pypy-dulwich",
"binary_version": "0.19.15-1build1"
},
{
"binary_name": "python3-dulwich",
"binary_version": "0.19.15-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "dulwich",
"purl": "pkg:deb/ubuntu/dulwich@0.19.15-1build1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.19.11-2",
"0.19.14-4ubuntu1",
"0.19.15-1",
"0.19.15-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-dulwich",
"binary_version": "0.20.31-1.1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "dulwich",
"purl": "pkg:deb/ubuntu/dulwich@0.20.31-1.1build1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.20.15-1ubuntu1",
"0.20.31-1ubuntu1",
"0.20.31-1.1",
"0.20.31-1.1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-dulwich",
"binary_version": "0.21.6-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "dulwich",
"purl": "pkg:deb/ubuntu/dulwich@0.21.6-1build2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.21.6-1",
"0.21.6-1build1",
"0.21.6-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-dulwich",
"binary_version": "0.22.7-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "dulwich",
"purl": "pkg:deb/ubuntu/dulwich@0.22.7-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.22.7-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-dulwich",
"binary_version": "1.1.0-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "dulwich",
"purl": "pkg:deb/ubuntu/dulwich@1.1.0-3?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.22.7-1",
"0.24.2-2",
"1.1.0-2ubuntu1",
"1.1.0-3"
]
}
],
"aliases": [],
"details": "Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.23.2 and prior to version 1.2.5, `dulwich.porcelain.submodule_update`, and by extension `porcelain.clone(..., recurse_submodules=True)`, materializes attacker-controlled submodule paths from a crafted upstream repository without path validation. A malicious `.gitmodules` plus a matching tree gitlink whose `path` is `.git/hooks` (or any other directory inside the parent repository\u0027s `.git` directory) causes the attacker\u0027s submodule tree contents to be written directly into the victim\u0027s `.git/hooks/` directory, preserving executable mode bits. The dropped executables are then run by any subsequent `git` or `dulwich` command that invokes the matching hook, resulting in arbitrary code execution. This is the dulwich equivalent of the upstream Git fixes for CVE-2024-32002 / CVE-2024-32004, which were never propagated into dulwich\u0027s separately implemented submodule porcelain. Version 1.2.5 patches the issue.",
"id": "UBUNTU-CVE-2026-52726",
"modified": "2026-06-17T04:30:55Z",
"published": "2026-06-10T23:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-52726"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-52726"
},
{
"type": "REPORT",
"url": "https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5"
},
{
"type": "REPORT",
"url": "https://github.com/jelmer/dulwich/security/advisories/GHSA-gfhv-vqv2-4544"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-52726"
]
}
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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.
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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.
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