CVE-2026-34393 | 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.

Published: 2026-04-15 Last update: 2026-04-21 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-34393 is rated Low Risk (39.3/100): CVSS High severity, with low exploitation likelihood (EPSS 0.04%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-34393

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-16 — 0.04% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-34393

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2026-34393

GitHub Security Advisory for CVE-2026-34393

GHSA-3382-gw9x-477v · Severity: high · Ecosystem: pip — Weblate: Privilege escalation in the user API endpoint

OS Trackers for CVE-2026-34393

vendor priority summary link
suse high — https://www.suse.com/security/cve/CVE-2026-34393/

Affected software / configurations for CVE-2026-34393

Vendor Product Version Raw CPE
weblate weblate < 5.17 cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:*

References for CVE-2026-34393

cvelogic Threat Intelligence