Low 2.0Published Mar 10, 2026

CVE-2026-30977RenderBlocking has Stored XSS in renderblocking-css with Inline Assets mode

Updated under an hour ago (Oct 27, 2026, 5:10 AM ET)

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Every CVE for lihaohong6 RenderBlocking

Exploited in the last 30 days

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.

CVSS: 2.0 LOW (v4.0, CNA)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
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Mar 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

lihaohong6 RenderBlocking lihaohong6:renderblocking (from the name)	before 0.1.1	CNA record

References

References

https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r	x-refsource-confirm
https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be	x-refsource-misc
https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.