CVE-2026-18149

A flaw was found in undici. A remote attacker, by controlling a server, could exploit a vulnerability in undici's retry handler. When a server sends an incomplete response body and then a non-retryable status, the original response body can become orphaned and never properly closed. This leads to...

CVE-2026-18149 undici vulnerable to Denial of Service via orphaned RetryHandler response body

undici's retry handler can leave an already-exposed response body pending forever. When a server returns a successful response that declares a Content-Length, sends only part of the body, and closes the connection, the retry handler retries the request. If the retry returns a non-retryable status...

CVE-2026-18149

undici 's RetryHandler can leave an already-exposed response body orphaned when a server sends a partial body with a declared Content-Length, closes the connection, and the retry returns a non-retryable status (e.g., 400). The original body stream is neither ended nor destroyed, so reads on it ne...