Weblate SSRF: outbound URL guard misses the NAT64 well-known prefix (64:ff9b::/96)_CVE-2026-50127

{
    "lastseen": "",
    "description": "Weblate is a web based localization tool. From version 5.15 to before version 2026.6, Weblate's VCS_RESTRICT_PRIVATE did not properly account for some transitional IPv6 ranges, multicast addresses, or some semi-private IPv4 ranges, which allowed some addresses to bypass private range restrictions. This issue has been patched in version 2026.6.",
    "published": "2026-06-10T19:56:37.829Z",
    "modified": "2026-06-10T19:56:37.829Z",
    "type": "cve",
    "title": "Weblate SSRF: outbound URL guard misses the NAT64 well-known prefix (64:ff9b::/96)",
    "source": "GitHub_M",
    "references": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-vmfc-9982-2m45\nhttps://github.com/WeblateOrg/weblate/pull/19768\nhttps://github.com/WeblateOrg/weblate/releases/tag/weblate-2026.6",
    "id": "CVE-2026-50127",
    "bulletinFamily": "",
    "cwe": [
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "WeblateOrg weblate >= 5.15, < 2026.6",
    "sourceHref": "",
    "cvss": {
        "score": 5.9,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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": ">= 5.15, < 2026.6",
    "vendor": "WeblateOrg",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}