What is CVE-2026-54707?

CVE-2026-54707 is a medium-severity vulnerability in Onionshare, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-07-31.

How severe is CVE-2026-54707?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Onionshare

CVE-2026-54707

OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. Prior to 2.6.4, OnionShare CLI/Desktop does not enforce the Receive mode disable_files setting in cli/onionshare_cli/web/receive_mode.py, where ReceiveModeRequest._get_file_stream() writes multipart file[] data to disk despite the text-only setting. This issue is fixed in version 2.6.4.

Vulnerability class: Broken Access Control

EPSS: 0.003 (20.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Onionshare — versions < 2.6.4

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-54707?: CVE-2026-54707 is a medium-severity vulnerability in Onionshare, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-07-31.
How severe is CVE-2026-54707?: Medium severity. CVSS v3 base score is 5.4 out of 10.