Weblate: SSRF via the webhook add-on using unprotected fetch_url()
Priority LOW 19CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00275 19th percentileScored 2026-11-07
Fix Fixed weblate (WeblateOrg): 5.17Weblate (PyPI): 5.17
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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 | 5.17 | Patch available | CNA |
| — | Weblate (PyPI) | before 5.17 | 5.17 | Patch available | GHSA-f8hv-g549-hwg2 |
- weblate VendorWeblateOrg Affected before 5.17 Fixed in 5.17 Patch available CNA
- Weblate (PyPI) Vendor— Affected before 5.17 Fixed in 5.17 Patch available GHSA-f8hv-g549-hwg2
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:* | before 5.17 | Vulnerable | WeblateOrg |
- cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:* Versions before 5.17 Vulnerable ·WeblateOrg
Remediation
- Fix · CNA weblate (WeblateOrg) Fixed in 5.17
- Fix · GHSA-f8hv-g549-hwg2 Weblate (PyPI) Fixed in 5.17 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-39845
- 2026-10-03 Alias added: GHSA-f8hv-g549-hwg2
References
Advisory 2
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-2026-39845 · CVE Program
- CVE-2026-39845 · NVD
- FIRST EPSS
- GHSA-f8hv-g549-hwg2 · GitHub Advisory Database · CC BY 4.0
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