Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision_CVE-2026-40256

{
    "lastseen": "",
    "description": "Weblate is a web based localization tool. In versions prior to 5.17, repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside). This issue has been fixed in version 5.17.",
    "published": "2026-04-15T18:36:44.975Z",
    "modified": "2026-04-15T18:36:44.975Z",
    "type": "cve",
    "title": "Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision",
    "source": "GitHub_M",
    "references": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-ffgh-3jrf-8wvh\nhttps://github.com/WeblateOrg/weblate/commit/e30dbcb33ae78e754ecef192d54f996b89cb4e15",
    "id": "CVE-2026-40256",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22"
    ],
    "cvelist": null,
    "sourceData": "WeblateOrg weblate < 5.17",
    "sourceHref": "",
    "cvss": {
        "score": 5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
        "version": "3.1"
    },
    "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": "weblate",
    "version": "< 5.17",
    "vendor": "WeblateOrg",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}