CVE-2026-49853: Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed…

PriorityP345high7.7CVSS 3.1

AVNACLPRLUINSCCHINAN

EPSS

0.36%

29.2th percentile

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization, auth_username, auth_password, and auth_mode in place when a redirect changed scheme, host, or port. This issue is fixed in version 6.5.6.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
tornadoweb	tornado	< 6.5.6	6.5.6
tornadoweb	tornado	>= 0 < 6.5.6	6.5.6

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