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Potential fix for code scanning alert no. 5: Incomplete multi-character sanitization #9

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Merged
CheFu-code merged 1 commit into from
Jun 19, 2026
Merged

Potential fix for code scanning alert no. 5: Incomplete multi-character sanitization #9

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18 changes: 12 additions & 6 deletions src/lib/flow-console/reader.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -157,12 +157,18 @@
}

function sanitizeReaderHtml(value: string) {
const body = extractBody(value)
.replace(/<!doctype[^>]*>/gi, '')
.replace(/<head[^>]*>[\s\S]*?<\/head>/gi, '')
.replace(unsafeTagPattern, '')
.replace(unsafeSelfClosingTagPattern, '')
.replace(/<!--[\s\S]*?-->/g, '');
let body = extractBody(value);
let previous: string;

do {
previous = body;
body = body
.replace(/<!doctype[^>]*>/gi, '')
.replace(/<head[^>]*>[\s\S]*?<\/head>/gi, '')
.replace(unsafeTagPattern, '')

Check failure

Code scanning / CodeQL

Incomplete multi-character sanitization High

This string may still contain
<script
Loading
, which may cause an HTML element injection vulnerability.
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CheFu-code marked this conversation as resolved.
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.replace(unsafeSelfClosingTagPattern, '')

Check failure

Code scanning / CodeQL

Incomplete multi-character sanitization High

This string may still contain
<script
Loading
, which may cause an HTML element injection vulnerability.
Comment thread
CheFu-code marked this conversation as resolved.
Dismissed
.replace(/<!--[\s\S]*?-->/g, '');
} while (body !== previous);

return body.replace(tagPattern, (match, tagName, rawAttributes) => {
const tag = String(tagName).toLowerCase();
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