What is CVE-2026-34393?

CVE-2026-34393 is a high-severity vulnerability in Weblate, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2026-04-15.

How severe is CVE-2026-34393?

High severity. CVSS v3 base score is 8.8 out of 10.

Privilege escalation in Weblate

CVE-2026-34393

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.

Vulnerability class: Privilege Escalation

Published 2026-04-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (44.4th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Weblate
Weblateorg Weblate — versions < 5.17

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

github.com/WeblateOrg/weblate/security/advisories/GHSA-3382-gw9x-477v (Third Party Advisory)
github.com/WeblateOrg/weblate/pull/18687 (Patch, Issue Tracking)

Frequently asked questions

What is CVE-2026-34393?: CVE-2026-34393 is a high-severity vulnerability in Weblate, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2026-04-15.
How severe is CVE-2026-34393?: High severity. CVSS v3 base score is 8.8 out of 10.