Description
Weblate is a web based localization tool. Prior to version 5.17.1, an authenticated user with project.add permission (default on hosted Weblate SaaS and for any user holding an active billing/trial plan) can import a crafted project backup ZIP whose components/<name>.json contains an attacker-chosen repo URL pointing at a private address (e.g. http://127.0.0.1:9999/) or using a non-allow-listed scheme (e.g. file://, git://). Weblate persists the component via Component.objects.bulk_create([component])[0], which bypasses Django's full_clean() and therefore never runs the validate_repo_url validator. The URL is subsequently written verbatim into .git/config by configure_repo(pull=False). This issue has been patched in version 5.17.1.
Affected products
weblate: weblate
References6
- github.com/WeblateOrg/weblate/security/advisories/GHSA-cwcx-382… PatchVendor Advisory
- github.com/WeblateOrg/weblate/commit/e1eff1f517c1ee315d69581910… Patch
- github.com/WeblateOrg/weblate/commit/e4b67a76d95d5165ecb9937f74… Patch
- github.com/WeblateOrg/weblate/pull/19061 Issue TrackingPatch
- github.com/WeblateOrg/weblate/pull/19062 Issue TrackingPatch
- github.com/WeblateOrg/weblate/releases/tag/weblate-5.17.1 Release Notes
Metrics
- CVSS 3.1
-
8.1
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - CVSS 4.0
-
5.3
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 32 · as of 13 November 2026
- CWE
- CWE-20CWE-918
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.