PT-2026-136757
CVE-2026-120651
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Published
2026-11-03
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Updated
2026-11-04
Description by
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CGI versions before 5.00 for Perl allow an infinite loop on a short request body when $DISABLE UPLOADS is set.
When $CGI::PUTDATA UPLOAD or an upload hook is set, read postdata putdata takes a request body that is not a form submission. With $CGI::DISABLE UPLOADS set, it discards the body by reading until Content-Length bytes have arrived. Once a body shorter than its Content-Length runs out, every read returns 0, so the loop never ends.
A client can keep a server process spinning with one such request.
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