CVE-2022-21688: OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat

Q: How do I fix CVE-2022-21688?

onionshare: upgrade to 2.5. Exact commands for each OS are on this page.

Q: Is CVE-2022-21688 being exploited?

CVE-2022-21688 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-21688 affect?

CVE-2022-21688 affects onionshare. Severity is high (CVSS 7.5). OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. Affected versions of the desktop application were found to be vulnerable to denial of service

Q: How urgent is CVE-2022-21688?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2022-21688 is a high-severity flaw (CVSS 7.5) affecting onionshare. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. Affected versions of the desktop application were found to be vulnerable to denial of service via an undisclosed vulnerability in the QT image parsing. Roughly 20 bytes lead to 2GB memory consumption and this can be triggered multiple times. To be abused, this vulnerability requires rendering in the his

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-125
Published	2022-01-18
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: onionshare

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-18 22:15 UTCPublished CVE record published
2026-06-17 04:26 UTCUpdated Record last modified

onionshare onionshare UPGRADE

Affected: < 2.5

Fixed in: 2.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy onionshare || rpm -q onionshare || onionshare --version

2. UPGRADE to 2.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade onionshare

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade onionshare

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-21688?

onionshare: upgrade to 2.5. Exact commands for each OS are on this page.

Is CVE-2022-21688 being exploited?

CVE-2022-21688 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-21688 affect?

CVE-2022-21688 affects onionshare. Severity is high (CVSS 7.5). OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. Affected versions of the desktop application were found to be vulnerable to denial of service

How urgent is CVE-2022-21688?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-21696 MEDIUM 4.3 UPGRADE OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat
CVE-2022-21695 MEDIUM 4.3 UPGRADE OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat
CVE-2022-21694 LOW 3.7 UPGRADE OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat
CVE-2022-21693 MEDIUM 6.3 UPGRADE OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat
CVE-2022-21692 MEDIUM 4.3 UPGRADE OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat

References

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