Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81
- https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1
- https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-
FAQ
What is CVE-2026-30977?
CVE-2026-30977 is a documented vulnerability. 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...
How severe is CVE-2026-30977?
CVSS scoring is not yet available for CVE-2026-30977. Check NVD for updates.
Is there a patch for CVE-2026-30977?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.