Moderate severityNVD Advisory· Published Mar 10, 2026· Updated Mar 11, 2026
Copyparty volflag `nohtml` did not block javascript in svg files
CVE-2026-30974
Description
Copyparty is a portable file server. Prior to v1.20.11., the nohtml config option, intended to prevent execution of JavaScript in user-uploaded HTML files, did not apply to SVG images. A user with write-permission could upload an SVG containing embedded JavaScript, which would execute in the context of whichever user opens it. This has been fixed in v1.20.11.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
copypartyPyPI | < 1.20.11 | 1.20.11 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-m6hv-x64c-27mmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-30974ghsaADVISORY
- github.com/9001/copyparty/commit/1c9f894e149b6be3cc7de81efc93a4ce4766e0e5ghsax_refsource_MISCWEB
- github.com/9001/copyparty/releases/tag/v1.20.11ghsax_refsource_MISCWEB
- github.com/9001/copyparty/security/advisories/GHSA-m6hv-x64c-27mmghsax_refsource_CONFIRMWEB
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