TI-2022-06065 Aliases CVE-2022-21689 GHSA-jh82-c5jw-pxpc

Denial of Service in Onionshare

MEDIUM 42CWE-400Published 2022-01-18 · Updated 2025-04-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

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 the receive mode limits concurrent uploads to 100 per second and blocks other uploads in the same second, which can be triggered by a simple script. An adversary with access to the receive mode can block file upload for others. There is no way to block this attack in public mode due to the anonymity properties of the tor network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01347 71st 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: Yes
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)	before 2.5	2.5	Patch available	GHSA-jh82-c5jw-pxpc

onionshare Vendoronionshare Affected before 2.5 Fixed in 2.5 Patch available CNA
onionshare-cli (PyPI) Vendor— Affected before 2.5 Fixed in 2.5 Patch available GHSA-jh82-c5jw-pxpc

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-jh82-c5jw-pxpc onionshare-cli (PyPI) Fixed in 2.5 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2022-21689
2026-10-03 Alias added: GHSA-jh82-c5jw-pxpc

References

Advisory 3

Other 2

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-2022-06064 Out-of-bounds Read in Onionshare CVSS 3.1HIGH 7.5
TI-2022-06069 Path traversal in Onionshare CVSS 3.1MEDIUM 6.5
TI-2018-14146 The debug_mode function in web/web.py in OnionShare through 1.3.1, when --debug is… CVSS 3.0HIGH 7.0

See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences