JavaScript Execution Vulnerability in Copyparty File Server by 9001
CVE-2026-30974

4.6MEDIUM

Key Information:

Vendor

9001

Status
Copyparty
Vendor
CVE Published:
10 March 2026

What is CVE-2026-30974?

The Copyparty file server, prior to version 1.20.11, had a security flaw involving the nohtml config option that failed to prevent JavaScript execution within SVG files. Users with write permissions could upload SVG images containing embedded JavaScript, leading to potential exploitation whenever another user opened the file. This vulnerability has been addressed in version 1.20.11.

Affected Version(s)

copyparty < 1.20.11

References

https://github.com/9001/copyparty/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/9001/copyparty/commit/1c9f894e149b6be3...
x_refsource_MISC
https://github.com/9001/copyparty/releases/tag/v1.20.11
x_refsource_MISC

CVSS V3.1

Score:
4.6
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.