Improper Access Control in Onionshare
Priority LOW 21CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.
Summary
OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions chat participants can spoof their channel leave message, tricking others into assuming they left the chatroom.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00679 52nd percentileScored 2026-11-07
Fix Fixed onionshare (onionshare): 2.5onionshare-cli (PyPI): 2.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| onionshare | onionshare | before 2.5 | 2.5 | Patch available | CNA |
| — | onionshare-cli (PyPI) | 2.3 to before 2.5 | 2.5 | Patch available | GHSA-w9m4-7w72-r766 |
- onionshare Vendoronionshare Affected before 2.5 Fixed in 2.5 Patch available CNA
- onionshare-cli (PyPI) Vendor— Affected 2.3 to before 2.5 Fixed in 2.5 Patch available GHSA-w9m4-7w72-r766
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:onionshare:onionshare:*:*:*:*:*:*:*:* | before 2.5 | Vulnerable | onionshare |
- cpe:2.3:a:onionshare:onionshare:*:*:*:*:*:*:*:* Versions before 2.5 Vulnerable ·onionshare
Remediation
- Fix · CNA onionshare (onionshare) Fixed in 2.5
- Fix · GHSA-w9m4-7w72-r766 onionshare-cli (PyPI) Fixed in 2.5 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2022-21691
- 2026-10-03 Alias added: GHSA-w9m4-7w72-r766
References
Advisory 3
More Onionshare vulnerabilities
- TI-2022-06066 Cross-Site Scripting in Onionshare CVSS 3.1HIGH 8.7
- TI-2022-06068 Improper Access Control in Onionshare CVSS 3.1MEDIUM 4.3
- TI-2021-18479 OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to upload files on a… CVSS 3.1CRITICAL 9.8
- TI-2022-06065 Denial of Service in Onionshare CVSS 3.1HIGH 7.5
- TI-2022-06064 Out-of-bounds Read in Onionshare CVSS 3.1HIGH 7.5
- TI-2022-06069 Path traversal in Onionshare CVSS 3.1MEDIUM 6.5
Sources
- CVE-2022-21691 · CVE Program
- CVE-2022-21691 · NVD
- FIRST EPSS
- GHSA-w9m4-7w72-r766 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-21691 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences