high7.7
CVE-2026-49853
Tornado: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | tornado | < 6.5.6 | 6.5.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-3x9g-8vmp-wqvf
- https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf
- https://github.com/tornadoweb/tornado/commit/aba2569f7ed7a6bdbef816658fb6b7182531b751
- https://github.com/tornadoweb/tornado/pull/3626
- https://github.com/tornadoweb/tornado/releases/tag/v6.5.6