| Name | CVE-2026-35536 |
| Description | In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters. |
| 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) |
| References | DLA-4520-1 |
| Debian Bugs | 1132367 |
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 | fixed | |
| bookworm | 6.2.0-3+deb12u2 | vulnerable | |
| bookworm (security) | 6.2.0-3+deb12u4 | vulnerable | |
| trixie | 6.4.2-3 | vulnerable | |
| trixie (security) | 6.4.2-3+deb13u2 | vulnerable | |
| forky, sid | 6.5.5-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-tornado | source | bullseye | 6.1.0-1+deb11u4 | DLA-4520-1 | ||
| python-tornado | source | (unstable) | 6.5.5-1 | 1132367 |
https://github.com/tornadoweb/tornado/security/advisories/GHSA-78cv-mqj4-43f7
Fixed by: https://github.com/tornadoweb/tornado/commit/24a2d96ea115f663b223887deb0060f13974c104 (v6.5.5)