Is CVE-2026-33435 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-33435 being exploited in the wild.

How severe is CVE-2026-33435?

High severity, with a CVSS score of 8, published 15 April 2026.

Which products and versions are affected?

weblate (PyPI) < 5.17, ECOSYSTEM:introduced=0,fixed=5.17.

Is there a fix for CVE-2026-33435?

Yes. weblate (PyPI): upgrade to 5.17 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-33435 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-33435?

Check whether you run weblate (PyPI) or Weblate at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-33435: Weblate remote code execution in backup restoration

Q: Which products and versions are affected?

weblate (PyPI) < 5.17, ECOSYSTEM:introduced=0,fixed=5.17.

Q: Is there a fix for CVE-2026-33435?

Yes. weblate (PyPI): upgrade to 5.17 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-33435 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-33435?

Check whether you run weblate (PyPI) or Weblate at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-33435 · Severity: high · CVSS 8 · Published 2026-04-15

Weblate, a web-based translation and localization tool, is vulnerable to remote code execution during the project restoration process. An attacker with high-level privileges (sufficient to create projects) could upload a malicious backup containing specially crafted Git or Mercurial configuration files. If exploited, this allows the attacker to execute arbitrary commands on the server, potentially leading to a full system takeover or data theft.

Technologies: weblate (PyPI), Weblate. Vendors: PyPI, Weblate.

Quick answers

Is CVE-2026-33435 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-33435 being exploited in the wild.
How severe is CVE-2026-33435?: High severity, with a CVSS score of 8, published 15 April 2026.
Which products and versions are affected?: weblate (PyPI) < 5.17, ECOSYSTEM:introduced=0,fixed=5.17.
Is there a fix for CVE-2026-33435?: Yes. weblate (PyPI): upgrade to 5.17 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-33435 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-33435?: Check whether you run weblate (PyPI) or Weblate at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

weblate (PyPI): upgrade to 5.17 or later
```
pip install "weblate>=5.17"
```

Technical details

Weblate versions prior to 5.17 are vulnerable to Remote Code Execution (RCE) via the project backup restoration feature. The vulnerability stems from a failure to filter or neutralize dangerous Git and Mercurial configuration files within the backup archive (CWE-94, CWE-434). An attacker with high privileges (PR:H), such as the ability to create or manage projects, can upload a crafted backup file. During the restoration process, these configuration files can be leveraged to execute arbitrary code on the host system. The attack complexity is considered high (AC:H) as it requires specific conditions during restoration, and the scope is changed (S:C) because the exploit impacts the underlying operating system. This issue is addressed in Weblate 5.17.

Affected products

WeblateOrg weblate < 5.17

Identifiers

CVE-2026-33435
GHSA-558g-h753-6m33
PYSEC-2026-154

Timeline

2026-04-15: disclosed
2026-04-15: advisory: NVD publication date
2026-04-16: patched: GitHub Advisory published and fix confirmed in version 5.17

References

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