CVE-2026-32873
HighSummary
ewe to serwer internetowy Gleam. W wersjach od 0.8.0 do 3.0.4 występuje błąd w funkcji handle_trailers, który powoduje nieskończoną pętlę w przypadku odrzuconych nagłówków trailer (zabronionych lub niezgłoszonych). Błąd ten prowadzi do ciągłego przetwarzania tych samych nagłówków, co skutkuje 100% obciążeniem CPU.
Risk Assessment
Organizacja jest narażona na ataki ze strony nieautoryzowanych zdalnych klientów, którzy mogą wywołać nieskończoną pętlę, co prowadzi do zablokowania procesu i braku dostępności aplikacji. Problem ten uniemożliwia wprowadzenie obejścia na poziomie aplikacji.
Recommendation
Zaleca się aktualizację do wersji 3.0.5, w której problem został naprawiony, aby zminimalizować ryzyko związane z tą podatnością.
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Original NVD description (English source)
ewe is a Gleam web server. Versions 0.8.0 through 3.0.4 contain a bug in the handle_trailers function where rejected trailer headers (forbidden or undeclared) cause an infinite loop. When handle_trailers encounters such a trailer, three code paths (lines 520, 523, 526) recurse with the original buffer (rest) instead of advancing past the rejected header (Buffer(header_rest, 0)), causing decoder.decode_packet to re-parse the same header on every iteration. The resulting loop has no timeout or escape — the BEAM process permanently wedges at 100% CPU. Any application that calls ewe.read_body on chunked requests is affected, and this is exploitable by any unauthenticated remote client before control returns to application code, making an application-level workaround impossible. This issue is fixed in version 3.0.5.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

