Dulwich Vulnerable to Command Injection via Merge Driver Path_CVE-2026-42563

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-06-10T21:47:14.927Z",
    "modified": "2026-06-10T21:47:14.927Z",
    "type": "cve",
    "title": "Dulwich Vulnerable to Command Injection via Merge Driver Path",
    "source": "GitHub_M",
    "references": "https://github.com/jelmer/dulwich/security/advisories/GHSA-9277-mp7x-85jf\nhttps://github.com/jelmer/dulwich/commit/e3331b3b3a122fc313460182f928f59723580b7b\nhttps://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5",
    "id": "CVE-2026-42563",
    "bulletinFamily": "",
    "cwe": [
        "CWE-78"
    ],
    "cvelist": null,
    "sourceData": "jelmer dulwich >= 0.24.0, < 1.2.5",
    "sourceHref": "",
    "cvss": {
        "score": 7.7,
        "severity": "HIGH",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "dulwich",
    "version": ">= 0.24.0, < 1.2.5",
    "vendor": "jelmer",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}