# CVE-2026-34393: Weblate privilege escalation in user API endpoint

Source: https://junglewise.ai/threats/cve-2026-34393-weblate-privilege-escalation-in-user-api-endpoint  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-15. Updated: 2026-06-08  
License: CC BY 4.0 with a link back

CVE-2026-34393 · Severity: high · CVSS 8.8 · Published 2026-04-15

Weblate, a web-based translation management system, contains a vulnerability that allows users to escalate their privileges. By exploiting a flaw in the user profile editing interface, an attacker with a standard account could modify settings beyond their authorized scope. This could lead to unauthorized access to sensitive translation data or administrative control over the platform.

Technologies: [weblate (PyPI)](https://junglewise.ai/threats/technologies/weblate), [Weblate](https://junglewise.ai/threats/technologies/weblate-weblate). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi), [Weblate](https://junglewise.ai/threats/vendors/weblate).

## Quick answers

**Is CVE-2026-34393 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34393 being exploited in the wild.

**How severe is CVE-2026-34393?** High severity, with a CVSS score of 8.8, 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-2026-34393?** 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-2026-34393 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-34393?** 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

  ```sh
  pip install "weblate>=5.17"
  ```


## Technical details

A privilege escalation vulnerability exists in Weblate's user patching API endpoint (CWE-269). The root cause is a failure to properly limit the scope of edits when a user profile is updated via the API. An authenticated attacker with low privileges can exploit this over the network to modify user attributes they should not have access to, potentially gaining administrative rights. The vulnerability is fixed in version 5.17.

## Affected products

- WeblateOrg Weblate < 5.17

## Identifiers

- CVE-2026-34393
- GHSA-3382-gw9x-477v
- PYSEC-2026-155

## Timeline

- 2026-04-15: disclosed
- 2026-04-15: patched
- 2026-04-16: advisory

## References

- [https://api.github.com/users/tikket1](https://api.github.com/users/tikket1)
- [https://github.com/tikket1](https://github.com/tikket1)
- [https://api.github.com/users/tikket1/gists%7B/gist_id%7D](https://api.github.com/users/tikket1/gists%7B/gist_id%7D)
- [https://api.github.com/users/tikket1/repos](https://api.github.com/users/tikket1/repos)
- [https://avatars.githubusercontent.com/u/196829696?v=4](https://avatars.githubusercontent.com/u/196829696?v=4)
- [https://api.github.com/users/tikket1/events%7B/privacy%7D](https://api.github.com/users/tikket1/events%7B/privacy%7D)

## Related threats

- [Weblate argument injection in Mercurial backend](https://junglewise.ai/threats/cve-2026-86035-weblate-is-a-web-based-continuous-localization-platform-used-to)
- [Weblate IDOR in GroupViewSet authorization bypass](https://junglewise.ai/threats/cve-2026-55228-weblate-idor-in-groupviewset-authorization-bypass)
- [Weblate observable object existence disclosure via HTTP status codes](https://junglewise.ai/threats/cve-2026-55227-weblate-observable-object-existence-disclosure-via-http-status)
- [PYSEC-2026-2037 - Weblate leaks information via screenshots](https://junglewise.ai/threats/cve-2026-21889-weblate-information-disclosure-via-unprotected-screenshots)
- [PYSEC-2026-2040 - Weblate has an arbitrary file read via symbolic links](https://junglewise.ai/threats/cve-2025-68279-weblate-has-an-arbitrary-file-read-via-symbolic-links)