CVE-2026-27948: Copyparty vulnerable to reflected XSS via setck parameter

CVE-2026-27948 · Severity: low · CVSS 3.1 · Published 2026-02-26

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.

Technologies: copyparty (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-27948 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-27948 being exploited in the wild.
How severe is CVE-2026-27948?
Low severity, with a CVSS score of 3.1, published 26 February 2026.
Which products and versions are affected?
copyparty (PyPI) ECOSYSTEM:introduced=0,fixed=1.20.9.
Is there a fix for CVE-2026-27948?
Yes. copyparty (PyPI): upgrade to 1.20.9 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-27948?
Check whether you run copyparty (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • copyparty (PyPI): upgrade to 1.20.9 or later
    pip install "copyparty>=1.20.9"

Affected products

  • copyparty (PyPI) ECOSYSTEM:introduced=0,fixed=1.20.9

Identifiers

  • CVE-2026-27948
  • GHSA-62cr-6wp5-q43h
  • PYSEC-2026-2136

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