CVE-2026-50127

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Source
https://cve.org/CVERecord?id=CVE-2026-50127
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50127.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-50127
Aliases
Downstream
Related
Published
2026-06-10T19:56:37.829Z
Modified
2026-07-08T08:13:42.772957378Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Weblate SSRF: outbound URL guard misses the NAT64 well-known prefix (64:ff9b::/96)
Details

Weblate is a web based localization tool. From version 5.15 to before version 2026.6, Weblate's VCSRESTRICTPRIVATE 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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50127.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-918"
    ]
}
References

Affected packages

Git / github.com/weblateorg/weblate

Affected ranges

Type
GIT
Repo
https://github.com/weblateorg/weblate
Events
Introduced
a6bf0680599015a4b73b7992a3f60ad2451b415a
Fixed
37bbc41a979f5d3d20d8a3976784af8a3ca6c91a
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "5.15"
        },
        {
            "fixed": "2026.6"
        },
        {
            "introduced": "0"
        }
    ]
}

Affected versions

weblate-2026.*
weblate-2026.5
weblate-5.*
weblate-5.15
weblate-5.15.1
weblate-5.15.2
weblate-5.16
weblate-5.16.1
weblate-5.17
weblate-5.17.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50127.json"