{"id":"CVE-2026-30977","summary":"RenderBlocking has Stored XSS in renderblocking-css with Inline Assets mode","details":"RenderBlocking is a MediaWiki extension that allows interface administrators to specify render-blocking CSS and JavaScript. Prior to 0.1.1, there is Stored XSS in renderblocking-css with Inline Assets mode. $wgRenderBlockingInlineAssets = true and editsitecss user rights are required. This vulnerability is fixed in 0.1.1.","aliases":["GHSA-4h5r-8rjm-496r"],"modified":"2026-04-02T13:23:51.689802Z","published":"2026-03-10T17:40:38.098Z","database_specific":{"cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30977.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30977.json"},{"type":"ADVISORY","url":"https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30977"},{"type":"FIX","url":"https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lihaohong6/renderblocking","events":[{"introduced":"0"},{"fixed":"096fc47dad9dca153b02cba3db81f412c87fb2be"}]},{"type":"GIT","repo":"https://github.com/lihaohong6/renderblocking","events":[{"introduced":"0"},{"fixed":"096fc47dad9dca153b02cba3db81f412c87fb2be"}]}],"versions":["v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30977.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"}]}