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CVE PROGRAM SOURCE RECORD7.7 High

CVE-2026-49853

Tornado: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient

Description

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

tornadoweb tornado

  • < 6.5.6affected

References