Amazon Linux 2 Security Advisory: ALAS2-2026-3286
Advisory Released Date: 2026-05-14
Advisory Updated Date: 2026-05-14
Severity:
Medium
Issue Overview:
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. (CVE-2026-35536)
Affected Packages:
python-tornado
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update python-tornado or yum update --advisory ALAS2-2026-3286 to update your system.
New Packages:
aarch64:
python-tornado-4.2.1-3.amzn2.0.5.aarch64
python-tornado-doc-4.2.1-3.amzn2.0.5.aarch64
python-tornado-debuginfo-4.2.1-3.amzn2.0.5.aarch64
i686:
python-tornado-4.2.1-3.amzn2.0.5.i686
python-tornado-doc-4.2.1-3.amzn2.0.5.i686
python-tornado-debuginfo-4.2.1-3.amzn2.0.5.i686
src:
python-tornado-4.2.1-3.amzn2.0.5.src
x86_64:
python-tornado-4.2.1-3.amzn2.0.5.x86_64
python-tornado-doc-4.2.1-3.amzn2.0.5.x86_64
python-tornado-debuginfo-4.2.1-3.amzn2.0.5.x86_64