Vulnerability · Published Feb 26, 2026 · Assigned by GitHub_M
CVE-2026-27948Copyparty vulnerable to eflected cross-site scripting via setck parameter
Medium 5.4
In plain English
A medium-severity cross-site scripting in copyparty from 9001. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 90.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Copyparty is a portable file server. In versions prior to 1.20.9, an XSS allows for reflected cross-site scripting via URL-parameter `?setck=...`. Version 1.20.9 fixes the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | copyparty | 1.20.9 | GHSA-62cr-6wp5-q43h |
| PyPI | copyparty | 1.20.9 | PYSEC-2026-2136 |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N