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Fencer Vulns
medium 5.4

CVE-2026-54707 json

OnionShare Receive mode writes uploaded files even when file uploads are disabled

published 2026-07-31 3 mo ago modified 2026-09-10 59 d ago also EUVD-2026-51570 , GHSA-v833-3823-cmhp , PYSEC-2026-3586

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

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. 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.

Patch / fix

  • pypi onionshare-cli 2.6.4
  • onionshare onionshare 2.6.4
  • onionshare Debian 13 2.6.3-1+deb13u2
  • onionshare Debian 14 2.6.4-1

debian advisories DEBIAN-CVE-2026-54707

  • python-onionshare openSUSE Tumbleweed 2.6.4-1.1

opensuse advisories openSUSE-SU-2026:11169-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-54707 updated cvss 5.4

onionshare: Receive mode writes uploaded files even when file uploads are disabled

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/onionshare/onionshare/security/advisories/GHSA-v833-3823-cmhp referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
OSV 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Affected packages

ecosystem package affected fixed in
pypi onionshare-cli
<2.6.4
2.6.4

Affected products

  • onionshare onionshare

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.