Weblate is Vulnerable to Authenticated SSRF via Project Backup Import bypassing validate_repo_url
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WeblateOrg | weblate | before 5.17.1 | 5.17.1 | Patch available | CNA |
| — | weblate (PyPI) | before 5.17.1 | 5.17.1 | Patch available | GHSA-cwcx-382v-8m9g |
- weblate VendorWeblateOrg Affected before 5.17.1 Fixed in 5.17.1 Patch available CNA
- weblate (PyPI) Vendor— Affected before 5.17.1 Fixed in 5.17.1 Patch available GHSA-cwcx-382v-8m9g
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:* | before 5.17.1 | Vulnerable | WeblateOrg |
- cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:* Versions before 5.17.1 Vulnerable ·WeblateOrg
Remediation
- Fix · CNA weblate (WeblateOrg) Fixed in 5.17.1
- Fix · GHSA-cwcx-382v-8m9g weblate (PyPI) Fixed in 5.17.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-41654
- 2026-10-03 Alias added: GHSA-cwcx-382v-8m9g
References
Patch 5
- https://github.com/WeblateOrg/weblate/security/advisories/GHSA-cwcx-382v-8m9g
- https://github.com/WeblateOrg/weblate/pull/19061
- https://github.com/WeblateOrg/weblate/pull/19062
- https://github.com/WeblateOrg/weblate/commit/e1eff1f517c1ee315d69581910baaabb724e5ef0
- https://github.com/WeblateOrg/weblate/commit/e4b67a76d95d5165ecb9937f7485fd79223b7f14
More WeblateOrg Weblate vulnerabilities
- TI-2025-23145 Weblate VCS credentials included in URL parameters are potentially logged and saved into browser history as plaintext CVSS 3.1HIGH 7.5
- TI-2025-38033 Weblate integration with Anubis can lead to Open Redirect via redir parameter CVSS 4.0LOW 2.1
- TI-2022-07893 Remote code execution (RCE) in Weblate CVSS 3.1HIGH 8.8
- TI-2025-41967 Weblate has git config file overwrite vulnerability that leads to remote code execution CVSS 3.1CRITICAL 9.1
- TI-2026-26679 Weblate: Privilege escalation in the user API endpoint CVSS 3.1HIGH 8.8
- TI-2026-19444 Weblate has an argument injection in management console CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-41654 · CVE Program
- CVE-2026-41654 · NVD
- FIRST EPSS
- GHSA-cwcx-382v-8m9g · GitHub Advisory Database · CC BY 4.0
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