CRITICAL9.8

PYSEC-2026-434

Remote unauthenticated attackers able to upload files in Onionshare

Quick fix

PYSEC-2026-434 — onionshare-cli: upgrade to the fixed version with the command below.

pip install --upgrade 'onionshare-cli>=2.4'

Details

OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to upload files on a non-public node when using the --receive functionality.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/onionshare-cli

Introduced in: 2.3Fixed in: 2.4

Fixpip install --upgrade 'onionshare-cli>=2.4'

References

https://nvd.nist.gov/vuln/detail/CVE-2021-41868[ADVISORY]
https://github.com/onionshare/onionshare/issues/1396[WEB]
https://github.com/onionshare/onionshare/pull/1404[WEB]
https://github.com/onionshare/onionshare[PACKAGE]
https://www.ihteam.net/advisory/onionshare[WEB]
https://pypi.org/project/onionshare-cli[PACKAGE]
https://github.com/advisories/GHSA-7g47-xxff-9p85[ADVISORY]