CVE-2026-33440 Weblate: Authenticated SSRF via redirect bypass of ALLOWED_ASSET_DOMAINS in screenshot URL uploads
Authenticated attackers can bypass asset domain restrictions via redirects to perform Server-Side Request Forgery in Weblate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33440?
CVE-2026-33440 is a medium-severity server-side request forgery vulnerability in WeblateOrg weblate, published on 15 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Weblate is a web based localization tool. In versions prior to 5.17, the ALLOWED_ASSET_DOMAINS setting applied only to the first issued requests and didn't restrict possible redirects. This issue has been fixed in version 5.17.
Weakness: CWE-918
Which versions are affected by CVE-2026-33440?
3 open source packages ship an affected version, including weblate. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
weblate PyPI | All versions | 5.17 |
weblate PyPI | All versions | 5.17 |
weblate PyPI | All versions | 5.17 |
Products include Weblate Weblate.
How do I fix CVE-2026-33440?
Upgrade weblate to 5.17 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-33440 being exploited?
There is no known exploitation of CVE-2026-33440 in the wild and no public exploit code.
Other vulnerabilities in WeblateOrg weblate
- CVE-2025-68398 Weblate has git config file overwrite vulnerability that leads to remote code execution
- CVE-2026-34393 Weblate: Privilege escalation in the user API endpoint
- CVE-2026-33435 Weblate: Remote code execution during backup restoration
- CVE-2026-34242 Weblate: Arbitrary File Read via Symlink
- CVE-2025-68279 Weblate has an arbitrary file read via symbolic links
Sources
Also known as GHSA-5fhx-9jwj-867m, PYSEC-2026-2312.