Authenticated privilege escalation via unrestricted user patching
Published Apr 15, 2026 · Updated Apr 15, 2026
Privilege escalation in Weblate before 5.17 allows remote authenticated users to exceed their assigned access through the user API. The user PATCH endpoint accepts edits beyond the fields and scope authorized for the calling account instead of restricting updates to permitted user attributes. A low-privileged account and network access to the API are required; successful requests grant privileges beyond the account's authorized edit scope.
Summary
What happened
Privilege escalation in Weblate before 5.17 allows remote authenticated users to exceed their assigned access through the user API. The user PATCH endpoint accepts edits beyond the fields and scope authorized for the calling account instead of restricting updates to permitted user attributes. A low-privileged account and network access to the API are required; successful requests grant privileges beyond the account's authorized edit scope.
The record
- CVE
- CVE-2026-34393
- Published
- Apr 15, 2026
- Updated
- Apr 15, 2026
- Vendor
- Weblate
- Product
- Weblate
- Classifications
- CWE-269, T1098
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 15, 2026CVE publishedPublication date reported by the CVE source.
- Apr 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 5.17
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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