LibreTranslate up to 1.9.6 improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in LibreTranslate up to 1.9.6. Impacted is an unknown function. The manipulation leads to improper authorization. This vulnerability is traded as CVE-2026-92803. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in LibreTranslate up to 1.9.6. It has been rated as problematic. This issue affects an unknown functionality. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

LibreTranslate through 1.9.6 omits the access_check decorator from the download_file route, allowing unauthenticated access to translated files. Attackers can bypass API key requirements and abuse ban lists to download files without authentication on protected instances.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-92803 since 09/16/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/17/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-81063). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• LibreTranslate

Version

• 1.9.0
• 1.9.1
• 1.9.2
• 1.9.3
• 1.9.4
• 1.9.5
• 1.9.6

Website

• Product: https://github.com/LibreTranslate/LibreTranslate/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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