Critical 9.6Published Jan 5, 2026

CVE-2025-55204muffon is a cross-platform music streaming client for desktop.

Updated under an hour ago (2026-10-19 09:10 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

muffon is a cross-platform music streaming client for desktop. Versions prior to 2.3.0 have a one-click Remote Code Execution (RCE) vulnerability in. An attacker can exploit this issue by embedding a specially crafted `muffon://` link on any website they control. When a victim visits the site or clicks the link, the browser triggers Muffon’s custom URL handler, causing the application to launch and process the URL. This leads to RCE on the victim's machine without further interaction. Version 2.3.0 patches the issue.

CVSS: 9.6 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-94, CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

muffon muffon muffon:muffon	before 2.3.0	NVD

References

https://drive.google.com/file/d/1eCPCQ6leuVM_vecfofFv04c0t9isCBqR/view?usp=sharingexploit
https://github.com/staniel359/muffon/releases/tag/v2.3.0product, release-notes
https://github.com/staniel359/muffon/security/advisories/GHSA-gc3f-gqph-522qexploit, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.