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.
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-f8hv-g549-hwg2