Incorrect Authorization Affecting onionshare-cli package, versions [,2.6.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published2 Aug 2026
- disclosed31 Jul 2026
- creditUnknown
Introduced: 31 Jul 2026
CVE-2026-54707 (opens in a new tab)How to fix?
Upgrade onionshare-cli to version 2.6.4 or higher.
Overview
onionshare-cli is a software that lets you securely and anonymously send and receive files. It works by starting a web server, making it accessible as a Tor onion service, and generating an unguessable web address so others can download files from you, or upload files to you. It does not require setting up a separate server or using a third party file-sharing service.
Affected versions of this package are vulnerable to Incorrect Authorization in the ReceiveModeRequest._get_file_stream process. An attacker can cause unauthorized files to be written to disk by sending crafted multipart POST requests to endpoints such as /upload or /upload-ajax, even when file uploads are explicitly disabled in the service configuration. This can result in unwanted file placement and disk consumption, potentially bypassing user-imposed restrictions on file uploads.