CVE-2026-35536
HIGH7.2EPSS 0.02%Tornado has cookie attribute injection via .RequestHandler.set_cookie
Published: 4/3/2026Modified: 5/11/2026
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.
Affected packages (2)
- Debian/python-tornadofrom 0, < 6.1.0-1+deb11u4
- PyPI/tornadofrom 0, < 6.5.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-35536
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-35536
- PATCHhttps://github.com/tornadoweb/tornado
- WEBhttps://github.com/tornadoweb/tornado/releases/tag/v6.5.5
- WEBhttps://github.com/tornadoweb/tornado/security/advisories/GHSA-78cv-mqj4-43f7