CVE-2026-42563

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Source
https://cve.org/CVERecord?id=CVE-2026-42563
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42563.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42563
Aliases
Downstream
Related
Published
2026-06-10T21:47:14.927Z
Modified
2026-08-04T11:50:56.717917367Z
Severity
  • 7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Dulwich Vulnerable to Command Injection via Merge Driver Path
Details

Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.24.0 and prior to version 1.2.5, Dulwich's ProcessMergeDriver substitutes the file path (from the git tree, controllable by an attacker via a malicious branch) into the merge driver command via the %P placeholder and executes it with subprocess.run(..., shell=True). An attacker who can cause a victim to merge an untrusted branch can achieve arbitrary command execution by crafting malicious file paths. Version 1.2.5 fixes the issue.

Database specific 
{
    "cwe_ids": [
        "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42563.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/jelmer/dulwich

Affected ranges

Type
GIT
Repo
https://github.com/jelmer/dulwich
Events
Introduced
031c690286ed5e6ddd199b4272587d590624b728
Fixed
073f4dfa9840af2da59887ed828b026b609faa6c
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0.24.0"
        },
        {
            "fixed": "1.2.5"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

dulwich-0.*
dulwich-0.24.0
dulwich-0.24.1
dulwich-0.24.2
dulwich-0.24.5
dulwich-0.24.6
dulwich-0.24.7
dulwich-0.24.8
dulwich-0.25.0
dulwich-0.25.1
dulwich-0.25.2
dulwich-1.*
dulwich-1.0.0
dulwich-1.1.0
dulwich-1.2.0
dulwich-1.2.1
dulwich-1.2.2
dulwich-1.2.3
dulwich-1.2.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42563.json"