OnionShare follows symlinks in shared directories, allowing unintended disclosure of local files

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

4.8 · CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

EPSS

• CVE-2026-54706: 0.34% estimated exploitation activity in the next 30 days; percentile 27.95 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary OnionShare CLI/Desktop 2.6.3 can follow symbolic links inside a selected Share or Website directory and serve the symlink target rather than limiting access to files physically contained in the selected directory. If a user shares a directory that contains attacker-supplied or otherwise untrusted symlinks, a remote recipient with access to the OnionShare service can read arbitrary local files readable by the OnionShare process that the symlink points to. This affects the shipped onionshare-cli Python package and the desktop application because both call the same onionsharecli.web file-indexing and streaming code. Details Tested repository: https://github.com/onionshare/onionshare at commit 8cc75e1d7e88bd31f7276733449d412bf71c8999. Affected product evidence: - cli/pyproject.toml declares onionsharecli version 2.6.3. - desktop/pyproject.toml declares onionshare version 2.6.3 and depends on onionsharecli from ../cli. - cli/setup.py publishes onionshare-cli and includes…

Published by the source

31 Jul 2026, 16:31 UTC

Last modified by the source

31 Jul 2026, 16:32 UTC

Source last checked

26 Oct 2026, 13:50 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-22p9-r2f5-22mf

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# Patch Next advisory brief: CVE-2026-54706

Advisory: OnionShare follows symlinks in shared directories, allowing unintended disclosure of local files
IDs: CVE-2026-54706, GHSA-22p9-r2f5-22mf
Record: https://patchnext.com/advisories/cve-2026-54706 (revision 1, source checked 26 Oct 2026, 13:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: onionshare-cli 2.6.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI onionshare-cli: affected < 2.6.4; fixed in 2.6.4

## Suggested inspection (read-only)
- `python -m pip show onionshare-cli`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on onionshare-cli.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-22p9-r2f5-22mf (GitHub-reviewed advisory GHSA-22p9-r2f5-22mf lists affected ranges: PyPI onionshare-cli >=0 <2.6.4)

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