PYSEC-2026-3416

Vulnerability from pysec - Published: 2026-07-13 15:46 - Updated: 2026-07-13 16:07
VLAI
Details

Impact

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.

Patches

  • https://github.com/WeblateOrg/weblate/pull/19768

Resources

The issue was reported by @tonghuaroot via GitHub, and the same user also provided the initial patch.

Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Impacted products
Name purl
weblate pkg:pypi/weblate
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "weblate",
        "purl": "pkg:pypi/weblate"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15"
            },
            {
              "fixed": "2026.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2026.5",
        "5.15",
        "5.15.1",
        "5.15.2",
        "5.16",
        "5.16.1",
        "5.16.2",
        "5.17",
        "5.17.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-50127",
    "GHSA-vmfc-9982-2m45"
  ],
  "details": "### Impact\n\nWeblate\u0027s `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.\n\n### Patches\n\n* https://github.com/WeblateOrg/weblate/pull/19768\n\n### Resources\n\nThe issue was reported by @tonghuaroot via GitHub, and the same user also provided the initial patch.",
  "id": "PYSEC-2026-3416",
  "modified": "2026-07-13T16:07:30.918681Z",
  "published": "2026-07-13T15:46:29.565097Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-vmfc-9982-2m45"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50127"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/pull/19768"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WeblateOrg/weblate"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/releases/tag/weblate-2026.6"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/weblate"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-vmfc-9982-2m45"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Weblate SSRF: outbound URL guard misses some private ranges"
}



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