CVE-2026-35536

EUVD-2026-18574
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.2 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 14%
Affected Products (NVD)
VendorProductVersion
tornadowebtornado
𝑥
< 6.5.5
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
python-tornado
bookworm
vulnerable
bookworm (security)
vulnerable
bullseye
vulnerable
bullseye (security)
6.1.0-1+deb11u4
fixed
forky
6.5.5-3
fixed
sid
6.5.5-4
fixed
trixie
vulnerable
trixie (security)
vulnerable
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
python3-tornado
RHEL 9
0:6.5.5-1.el9_8
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
python-tornado
Amazon Linux 2
0:4.2.1-3.amzn2.0.5
fixed
python-tornado-debuginfo
Amazon Linux 2
0:4.2.1-3.amzn2.0.5
fixed
python-tornado-debugsource
Amazon Linux 2023
0:6.1.0-2.amzn2023.0.8
fixed
python-tornado-doc
Amazon Linux 2
0:4.2.1-3.amzn2.0.5
fixed
Amazon Linux 2023
0:6.1.0-2.amzn2023.0.8
fixed
python3-tornado
Amazon Linux 2
0:5.0.2-4.amzn2.0.8
fixed
Amazon Linux 2023
0:6.1.0-2.amzn2023.0.8
fixed
python3-tornado-debuginfo
Amazon Linux 2
0:5.0.2-4.amzn2.0.8
fixed
Amazon Linux 2023
0:6.1.0-2.amzn2023.0.8
fixed
python3-tornado-doc
Amazon Linux 2
0:5.0.2-4.amzn2.0.8
fixed
python3.13-tornado
Amazon Linux 2023
0:6.4.2-1.amzn2023.0.3
fixed
python3.13-tornado-debuginfo
Amazon Linux 2023
0:6.4.2-1.amzn2023.0.3
fixed
python3.13-tornado-debugsource
Amazon Linux 2023
0:6.4.2-1.amzn2023.0.3
fixed
python3.13-tornado-doc
Amazon Linux 2023
0:6.4.2-1.amzn2023.0.3
fixed
Common Weakness Enumeration
References
https://github.com/tornadoweb/tornado/releases/tag/v6.5.5
https://github.com/tornadoweb/tornado/security/advisories/GHSA-78cv-mqj4-43f7