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Public proof of conceptFix available

CVE-2026-54707

A public proof of concept exists; no exploitation attested.

  • Published2026-07-31
  • Fixed in2.6.4
  • WeaknessCWE-863

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-07-3117:16CVE publishedNVD

Versions per branch

OSV
onionshare-cli
BranchAffectedFixed in
2.6< 2.6.42.6.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • onionshare
    Affected
    • = < 2.6.4no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-07-31

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • onionshareUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • onionshareUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • onionshareUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • onionshareUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • onionshareUbuntu:26.04:LTSall versions · no fixed version listed
  • onionshareUbuntu:24.04:LTSall versions · no fixed version listed
  • onionshareDebian:14all versions · fixed in 2.6.4-1
  • onionshareDebian:13all versions · fixed in 2.6.3-1+deb13u2

2 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-54707 Red Hat Product Security

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

Full record on NVD

Fix

  1. Update onionshare-cli to 2.6.4

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionpoc2026-07-31
  • CNACVSS 3.15.4known since 2026-10-23
  • CNAweakness (CWE)CWE-863known since 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2026-07-31

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Published
2026-07-31
Last Modified
2026-09-10
NVD status
Deferred
GitHub Advisory
GHSA-v833-3823-cmhp

Frequently asked questions

What is 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.

Is CVE-2026-54707 actively exploited?

A proof-of-concept exploit exists for CVE-2026-54707, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-54707?

CVE-2026-54707 has a CVSS v3 base score of 5.4 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

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Sources for this record