CVE-2026-49853

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.7 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N                                    

Vulnerability 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.

Vulnerability Details

Published Date

June 15, 2026

Last Modified

July 21, 2026

CWE ID

CWE-200

Source

GitHub

Vendor

pip

Product

tornado

External References

https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf
https://github.com/advisories/GHSA-3x9g-8vmp-wqvf

CVE-2026-49853

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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