{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "096fc47dad9dca153b02cba3db81f412c87fb2be"
            }
          ],
          "repo": "https://github.com/lihaohong6/renderblocking",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "096fc47dad9dca153b02cba3db81f412c87fb2be"
            }
          ],
          "repo": "https://github.com/lihaohong6/renderblocking",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4h5r-8rjm-496r"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30977.json"
  },
  "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.",
  "id": "CVE-2026-30977",
  "modified": "2026-04-01T23:10:33.028473750Z",
  "published": "2026-03-10T17:40:38.098Z",
  "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"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "RenderBlocking has Stored XSS in renderblocking-css with Inline Assets mode"
}