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Fix potential server-side request forgery vulnerability #722

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Merged
jamespepper81 merged 2 commits into from
May 27, 2026
Merged

Fix potential server-side request forgery vulnerability #722

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837f6ca
Potential fix for code scanning alert no. 12: Server-side request for…
jamespepper81 May 27, 2026
c7f1722
Merge pull request #721 from BitSleuthAI/alert-autofix-12
jamespepper81 May 27, 2026
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15 changes: 14 additions & 1 deletion src/lib/blockchain-api.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -72,7 +72,20 @@ function sanitizeProviderPathname(pathname: string): string {
throw new Error('Disallowed provider URL path.');
}

return trimmed;
const parts = trimmed.split('/');
const safeSegments: string[] = [];
for (let i = 1; i < parts.length; i++) {
const segment = parts[i];
if (!segment || segment === '.' || segment === '..') {
throw new Error('Disallowed provider URL path.');
}
if (!/^[a-zA-Z0-9\-._~]+$/.test(segment)) {
throw new Error('Disallowed provider URL path.');
}
safeSegments.push(segment);
}

return '/' + safeSegments.join('/');
}

export async function fetchJson(
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