{"id":"CVE-2026-30974","aliases":["GHSA-m6hv-x64c-27mm","PYSEC-2026-2137"],"url":"https://o3.security/vulnerability/CVE-2026-30974","summary":"Copyparty volflag `nohtml` did not block javascript in svg files","details":"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.","published":"2026-03-10T17:37:26.214Z","modified":"2026-08-12T03:51:11.002453014Z","cvss":{"score":4.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"},"epss":{"score":0.00323,"percentile":0.24529,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"copyparty","fixedVersion":"1.20.11"}],"fix":{"url":"https://github.com/9001/copyparty/commit/1c9f894e149b6be3cc7de81efc93a4ce4766e0e5","label":"9001/copyparty@1c9f894"},"references":[{"type":"WEB","url":"https://github.com/9001/copyparty/releases/tag/v1.20.11"},{"type":"ADVISORY","url":"https://github.com/9001/copyparty/security/advisories/GHSA-m6hv-x64c-27mm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30974.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30974"},{"type":"FIX","url":"https://github.com/9001/copyparty/commit/1c9f894e149b6be3cc7de81efc93a4ce4766e0e5"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:11.002453014Z"}}