Local file disclosure via shared directory symlinks
Published Jul 31, 2026 · Updated Jul 31, 2026
Link following in OnionShare before 2.6.4 allows remote authenticated users to read local files through shared directory symlinks. SendBaseModeWeb.set_file_info() accepts symlinks as files, and stream_individual_file() opens their targets without enforcing containment in the selected directory. Exploitation requires a user to share a directory containing an attacker-influenced symlink and exposes only files readable by the OnionShare process.
Summary
What happened
Link following in OnionShare before 2.6.4 allows remote authenticated users to read local files through shared directory symlinks. SendBaseModeWeb.set_file_info() accepts symlinks as files, and stream_individual_file() opens their targets without enforcing containment in the selected directory. Exploitation requires a user to share a directory containing an attacker-influenced symlink and exposes only files readable by the OnionShare process.
The record
- CVE
- CVE-2026-54706
- Published
- Jul 31, 2026
- Updated
- Jul 31, 2026
- Vendor
- OnionShare
- Product
- OnionShare
- Classifications
- CWE-59, T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 31, 2026CVE publishedPublication date reported by the CVE source.
- Jul 31, 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=< 2.6.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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