Vulnerability · Published Apr 15, 2026 · Assigned by GitHub_M
CVE-2026-39845Weblate: SSRF via the webhook add-on using unprotected fetch_url()
Medium 4.1
In plain English
A medium-severity server-side request forgery in weblate from WeblateOrg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.1Medium
Exploit odds (30 days)0.3%top 80.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | weblate | 5.17 | GHSA-f8hv-g549-hwg2 |
| PyPI | weblate | 5.17 | PYSEC-2026-156 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WeblateOrg | weblate | < 5.17 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
References
- https://github.com/WeblateOrg/weblate/security/advisories/GHSA-f8hv-g549-hwg2 x_refsource_CONFIRM
- https://github.com/WeblateOrg/weblate/pull/18815 x_refsource_MISC