| Name | CVE-2026-49853 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-tornado (PTS) | bullseye | 6.1.0-1 | vulnerable |
| bullseye (security) | 6.1.0-1+deb11u4 | vulnerable | |
| bookworm, bookworm (security) | 6.2.0-3+deb12u4 | vulnerable | |
| trixie (security), trixie | 6.4.2-3+deb13u2 | vulnerable | |
| forky, sid | 6.5.5-4 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-tornado | source | (unstable) | (unfixed) |
https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf