Vulnerability-Lookup

GHSA-F8HV-G549-HWG2

Vulnerability from github – Published: 2026-04-16 20:45 – Updated: 2026-04-16 20:45

Summary

Weblate: SSRF via the webhook add-on using unprotected fetch_url()

Details

Impact

The webhook add-on did not utilize existing SSRF protection.

Patches

https://github.com/WeblateOrg/weblate/pull/18815

Workarounds

Disabling the add-on would avoid misusing this.

References

Thanks to @Lihfdgjr for reporting this via GitHub.

Severity ?

4.1 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "weblate"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-39845"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T20:45:04Z",
    "nvd_published_at": "2026-04-15T19:16:36Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nThe webhook add-on did not utilize existing SSRF protection.\n\n### Patches\n* https://github.com/WeblateOrg/weblate/pull/18815\n\n### Workarounds\nDisabling the add-on would avoid misusing this.\n\n### References\nThanks to @Lihfdgjr for reporting this via GitHub.",
  "id": "GHSA-f8hv-g549-hwg2",
  "modified": "2026-04-16T20:45:04Z",
  "published": "2026-04-16T20:45:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-f8hv-g549-hwg2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39845"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WeblateOrg/weblate/pull/18815"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WeblateOrg/weblate"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Weblate: SSRF via the webhook add-on using unprotected fetch_url()"
}

CVE-2026-39845 (GCVE-0-2026-39845)

Vulnerability from cvelistv5 – Published: 2026-04-15 18:26 – Updated: 2026-04-15 20:01

Title

Weblate: SSRF via the webhook add-on using unprotected fetch_url()

Summary

Weblate is a web based localization tool. In versions prior to 5.17, the webhook add-on did not utilize existing SSRF protections. This issue has been fixed in version 5.17. If developers are unable to update immediately, they can disable the webhook add-on as a workaround.

Severity ?

4.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M

References

URL

Tags

	https://github.com/WeblateOrg/weblate/security/ad…	x_refsource_CONFIRM
	https://github.com/WeblateOrg/weblate/pull/18815	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	WeblateOrg	weblate	Affected: < 5.17

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-39845",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-15T19:37:00.454275Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-15T20:01:56.793Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "weblate",
          "vendor": "WeblateOrg",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.17"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Weblate is a web based localization tool. In versions prior to 5.17, the webhook add-on did not utilize existing SSRF protections. This issue has been fixed in version 5.17. If developers are unable to update immediately, they can disable the webhook add-on as a workaround."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-15T18:26:51.706Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-f8hv-g549-hwg2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-f8hv-g549-hwg2"
        },
        {
          "name": "https://github.com/WeblateOrg/weblate/pull/18815",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/WeblateOrg/weblate/pull/18815"
        }
      ],
      "source": {
        "advisory": "GHSA-f8hv-g549-hwg2",
        "discovery": "UNKNOWN"
      },
      "title": "Weblate: SSRF via the webhook add-on using unprotected fetch_url()"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-39845",
    "datePublished": "2026-04-15T18:26:51.706Z",
    "dateReserved": "2026-04-07T19:13:20.378Z",
    "dateUpdated": "2026-04-15T20:01:56.793Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-F8HV-G549-HWG2

Impact

Patches

Workarounds

References

CVE-2026-39845 (GCVE-0-2026-39845)

Tags

Sightings

Nomenclature