CVE-2026-116577: falha de média gravidade em tornadoweb tornado
Tornado: Quadratic CPU usage when parsing HTTP headers with line folding
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 5.3epss 0.4%
Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, Tornado's HTTP header parser accepts obsolete line folding and repeatedly concatenates short continuation lines, causing quadratic CPU consumption on the IOLoop thread. An unauthenticated client can submit a header block containing many obsolete line-folding continuations before application code runs, blocking other connections served by the process. The cost grows with max_header_size, and only availability is affected. This issue is fixed in version 6.6.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Produtos afetados
tornadoweb · tornadoCVEs relacionadas — tornadoweb tornado
No mesmo produto, das mais perigosas para as menos.
CVE-2024-52804HIGHTornado has HTTP cookie parsing DoS vulnerabilityEPSS 1.0%CVE-2025-47287HIGHTornado vulnerable to excessive logging caused by malformed multipart form dataEPSS 0.7%CVE-2026-103262HIGHTornado before 6.5.9 Denial of Service via CurlAsyncHTTPClientEPSS 0.6%CVE-2026-49855HIGHtornado AsyncHTTPClient accumulates decompressed chunks without size limit (gzip bomb)EPSS 0.6%CVE-2025-67725HIGHTornado is Vulnerable to Quadratic DoS via Repeated Header CoalescingEPSS 0.6%CVE-2025-67726HIGHTornado is Vulnerable to Quadratic DoS via Crafted Multipart ParametersEPSS 0.5%