GHSA-XRWR-FCW6-FMQ8

Vulnerability from github – Published: 2026-04-16 20:43 – Updated: 2026-04-16 20:43
VLAI?
Summary
Weblate: SSRF via Project-Level Machinery Configuration
Details

Impact

A user with the project.edit permission (granted by the per-project "Administration" role) can configure machine translation service URLs pointing to arbitrary internal network addresses. During configuration validation, Weblate makes an HTTP request to the attacker-controlled URL and reflects up to 200 characters of the response body back to the user in an error message. This constitutes a Server-Side Request Forgery (SSRF) with partial response read.

Patches

  • https://github.com/WeblateOrg/weblate/pull/18684
  • The solution then has been cleaned up in followup patches

Workarounds

Limiting available machinery services via WEBLATE_MACHINERY setting can avoid this.

References

Thanks to @DavidCarliez for disclosing this via GitHub private vulnerability reporting.

Severity ?
5.0 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "weblate"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34244"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T20:43:38Z",
    "nvd_published_at": "2026-04-15T19:16:35Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nA user with the `project.edit` permission (granted by the per-project \"Administration\" role) can configure machine translation service URLs pointing to arbitrary internal network addresses. During configuration validation, Weblate makes an HTTP request to the attacker-controlled URL and reflects up to 200 characters of the response body back to the user in an error message. This constitutes a Server-Side Request Forgery (SSRF) with partial response read.\n\n### Patches\n\n* https://github.com/WeblateOrg/weblate/pull/18684\n* The solution then has been cleaned up in followup patches\n\n### Workarounds\nLimiting available machinery services via WEBLATE_MACHINERY setting can avoid this.\n\n### References\n\nThanks to @DavidCarliez for disclosing this via GitHub private vulnerability reporting.",
  "id": "GHSA-xrwr-fcw6-fmq8",
  "modified": "2026-04-16T20:43:38Z",
  "published": "2026-04-16T20:43:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-xrwr-fcw6-fmq8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34244"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/pull/18684"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/commit/e619e9090202e4886b844c110d39308e7e882c0e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WeblateOrg/weblate"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Weblate: SSRF via Project-Level Machinery Configuration "
}


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