CVE-2026-34393

Weblate: Privilege escalation in the user API endpoint

8.8 HighFix available

Weblate is a web based localization tool. In versions prior to 5.17, the user patching API endpoint didn't properly limit the scope of edits. This issue has been fixed in version 5.17.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.39%Up 0.4 points since Apr 16, 2026

What each source reports

CVE List Score used 8.8

Weblate: Privilege escalation in the user API endpoint

Weblate is a web based localization tool. In versions prior to 5.17, the user patching API endpoint didn't properly limit the scope of edits. This issue has been fixed in version 5.17.

Record: CVE-2026-34393
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-269
Updated: 2026-11-02

EUVDEUVD-2026-23005 8.8

Weblate is a web based localization tool. In versions prior to 5.17, the user patching API endpoint didn't properly limit the scope of edits. This issue has been fixed in version 5.17.

Record: EUVD-2026-23005
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-3382-gw9x-477v 8.8

Weblate: Privilege escalation in the user API endpoint

Impact

The user patching API endpoint didn't properly limit the scope of edits.

Patches

https://github.com/WeblateOrg/weblate/pull/18687

References

Thanks to @tikket1 and @DavidCarliez for reporting this via GitHub. We received two individual reports for this.

Record: GHSA-3382-gw9x-477v
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-269
Updated: 2026-11-02

NVD 8.8

Weblate is a web based localization tool. In versions prior to 5.17, the user patching API endpoint didn't properly limit the scope of edits. This issue has been fixed in version 5.17.

Record: CVE-2026-34393
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-269
Updated: 2026-11-02

OSV 8.8

Weblate: Privilege escalation in the user API endpoint

Weblate is a web based localization tool. In versions prior to 5.17, the user patching API endpoint didn't properly limit the scope of edits. This issue has been fixed in version 5.17.

Record: CVE-2026-34393
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-269
Updated: 2026-11-02

OSVGHSA-3382-gw9x-477v 8.8

Weblate: Privilege escalation in the user API endpoint

Impact

The user patching API endpoint didn't properly limit the scope of edits.

Patches

https://github.com/WeblateOrg/weblate/pull/18687

References

Thanks to @tikket1 and @DavidCarliez for reporting this via GitHub. We received two individual reports for this.

Record: GHSA-3382-gw9x-477v
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-269
Updated: 2026-11-02

OSVPYSEC-2026-155 8.8

Weblate is a web based localization tool. In versions prior to 5.17, the user patching API endpoint didn't properly limit the scope of edits. This issue has been fixed in version 5.17.

Record: PYSEC-2026-155
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`weblate` PyPI	before 5.17	5.17
`weblate` PyPI	before 5.17, plus listed versions 1.92.02.12.102.10.1 Show 45 moreShow less 2.112.122.132.13.12.142.14.12.152.162.172.17.12.182.192.19.12.22.202.32.42.52.62.72.82.93.03.0.13.13.1.13.103.10.13.10.23.10.33.113.11.13.11.23.11.33.23.2.13.2.23.33.43.53.5.13.63.6.13.73.7.1	5.17

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-34393 is a high vulnerability (CVSS 8.8) in Weblate, published April 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. Fixed in weblate 5.17.

References

This page doesn't list everything

Left out here: 113 versions. The JSON record has them.