# CVE-2021-41868: PYSEC-2026-434 - Remote unauthenticated attackers able to upload files in Onionshare

Source: https://junglewise.ai/threats/cve-2021-41868-remote-unauthenticated-attackers-able-to-upload-files-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-29  
License: CC BY 4.0 with a link back

CVE-2021-41868 · Severity: low · CVSS 3.1 · Published 2026-06-29

Remote unauthenticated attackers able to upload files in Onionshare

Technologies: [onionshare-cli (PyPI)](https://junglewise.ai/threats/technologies/onionshare-cli). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2021-41868 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-41868 being exploited in the wild.

**How severe is CVE-2021-41868?** Low severity, with a CVSS score of 3.1, published 29 June 2026.

**Which products and versions are affected?** onionshare-cli (PyPI) ECOSYSTEM:introduced=2.3,fixed=2.4.

**Is there a fix for CVE-2021-41868?** Yes. onionshare-cli (PyPI): upgrade to 2.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-41868?** Check whether you run onionshare-cli (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- onionshare-cli (PyPI): upgrade to 2.4 or later

  ```sh
  pip install "onionshare-cli>=2.4"
  ```


## Affected products

- onionshare-cli (PyPI) ECOSYSTEM:introduced=2.3,fixed=2.4

## Identifiers

- CVE-2021-41868
- GHSA-7g47-xxff-9p85
- PYSEC-2026-434

## Related threats

- [OnionShare incorrect authorization in Receive mode file upload sink](https://junglewise.ai/threats/cve-2026-54707-onionshare-incorrect-authorization-in-receive-mode-file-upload)
- [OnionShare symlink traversal in Share and Website modes](https://junglewise.ai/threats/cve-2026-54706-onionshare-symlink-traversal-in-share-and-website-modes)
- [PYSEC-2026-696 - Information disclosure vulnerability in OnionShare](https://junglewise.ai/threats/cve-2021-41867-information-disclosure-vulnerability-in-onionshare)
- [Withdrawn Advisory: OnionShare Predictable Pathname](https://junglewise.ai/threats/cve-2018-19960-withdrawn-advisory-onionshare-predictable-pathname)
- [PYSEC-2022-41 - OnionShare is an open source tool that lets you securely and anonymously share files, host websites…](https://junglewise.ai/threats/cve-2022-21690-otf-001-improper-input-sanitation-the-path-parameter-of-the)