VDB
CVE-2026-49853
CVE-2026-49853
PUBLISHED
CVSS 7.7 HIGH
Reported by GitHub_M · Published July 14, 2026
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.
Risk Scores
CVSS 3.1
7.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| tornadoweb | tornado | < 6.5.6 |
| tornadoweb | tornado | < 6.5.6, < 6.5.6 |
| chainguard | mitmproxy | 0, 0, 0 |
| wolfi | mitmproxy | 0, 0, 0 |
Timeline
- Jun 13, 2026 CVE Published
- Jul 15, 2026 Coalition ESS Score
- Jul 15, 2026 Security Advisory
- Aug 7, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 3, 2026 EPSS Score
- Sep 6, 2026 EPSS Score
References
- https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf x_refsource_CONFIRM
- https://github.com/tornadoweb/tornado/pull/3626 x_refsource_MISC
- https://github.com/tornadoweb/tornado/commit/aba2569f7ed7a6bdbef816658fb6b7182531b751 x_refsource_MISC
- https://github.com/tornadoweb/tornado/releases/tag/v6.5.6 x_refsource_MISC