Upstream information
Description
Dulwich is a pure-Python implementation of the Git file formats and protocols. Versions starting with 0.10.0 and prior to 1.2.5 have an arbitrary file write leading to remote code execution when cloning or checking out a malicious Git repository on Windows. Dulwich's path-element validator accepted tree entries whose filenames contained bytes that Windows interprets as structural path syntax. Contributing configuration bugs made matters worse. The core.protectNTFS and core.protectHFS settings were looked up under a wrong option name and so user-set values were silently ignored, and core.protectNTFS only defaulted to true on Windows (Git upstream has defaulted it to true everywhere since CVE-2019-1353). Both have been corrected. Anyone who clones, fetches, or checks out an untrusted repository with Dulwich on Windows - either through the Dulwich CLI, porcelain.clone, or any downstream tool built on Dulwich - is impacted. POSIX clones are not directly exploitable (on POSIX \ is a literal filename byte), but a POSIX user can unknowingly propagate a malicious tree to Windows consumers via push or re-publication. This issue is fixed in Dulwich 1.2.5. Users should upgrade to 1.2.5 or later. There is no effective pre-patch workaround. On affected versions the core.protectNTFS configuration key was silently ignored, so setting it to true does not mitigate the issue. Users who cannot upgrade should avoid cloning, fetching, or checking out untrusted repositories with Dulwich on Windows. After upgrading the NTFS validator is on by default on every platform, so no additional configuration is required.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 8.8 | 6.9 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | High |
| Privileges Required | None | None |
| User Interaction | Required | Required |
| Scope | Unchanged | Changed |
| Confidentiality Impact | High | Low |
| Integrity Impact | High | High |
| Availability Impact | High | None |
| CVSSv3 Version | 3.1 | 3.1 |
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2026-10900 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | python3-dulwich | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 | python-dulwich | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python3-dulwich | Not affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | python3-dulwich | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python3-dulwich | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | python3-dulwich | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python3-dulwich | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 12 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server 12 SP5 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python3-dulwich | Not affected |
| SUSE Manager Proxy 4.3 | python3-dulwich | Not affected |
| SUSE Manager Proxy LTS 4.3 | python3-dulwich | Not affected |
| SUSE Manager Retail Branch Server 4.3 | python3-dulwich | Not affected |
| SUSE Manager Retail Branch Server LTS 4.3 | python3-dulwich | Not affected |
| SUSE Manager Server 4.3 | python3-dulwich | Not affected |
| SUSE Manager Server LTS 4.3 | python3-dulwich | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Desktop 15 SP4 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Desktop 15 SP5 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python3-dulwich | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python3-dulwich | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python3-dulwich | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server 12 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server 12 SP3 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server 12 SP4 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | python-dulwich | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | python3-dulwich | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | python3-dulwich | Not affected |
| openSUSE Leap 15.4 | python3-dulwich | Not affected |
| openSUSE Leap 15.5 | python3-dulwich | Not affected |
| openSUSE Leap 15.6 | python3-dulwich | Not affected |
SUSE Timeline for this CVE
CVE page created: Sat May 30 11:34:33 2026CVE page last modified: Thu Jun 11 13:29:03 2026