undici vulnerable to Denial of Service via unhandled error on excessive content-encodings

影響: npm:undici >= 6.23.0, < 6.29.1 → 6.29.1, npm:undici >= 7.18.0, < 7.30.1 → 7.30.1, npm:undici >= 8.0.0, < 8.12.2 → 8.12.2

undici's fetch() crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses (a content-encoding limit), but it created the internal response stream before that check and returned without attaching an error listener or aborting the request. The early close then surfaces a content-length mismatch on that orphaned internal stream, which Node.js treats as an unhandled err…

Read on GitHub Advisory Database

On 10/24/2026, 07:14 AM, GitHub Advisory Database published "undici vulnerable to Denial of Service via unhandled error on excessive content-encodings" (type: Advisory). Severity is "High" (high). Related technologies: JavaScript / Node.js. CVE: CVE-2026-109869.