Amazon Linux 2 Security Advisory: ALAS2-2026-3287
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:
python3-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 python3-tornado or yum update --advisory ALAS2-2026-3287 to update your system.
New Packages:
aarch64:
python3-tornado-5.0.2-4.amzn2.0.8.aarch64
python3-tornado-doc-5.0.2-4.amzn2.0.8.aarch64
python3-tornado-debuginfo-5.0.2-4.amzn2.0.8.aarch64
i686:
python3-tornado-5.0.2-4.amzn2.0.8.i686
python3-tornado-doc-5.0.2-4.amzn2.0.8.i686
python3-tornado-debuginfo-5.0.2-4.amzn2.0.8.i686
src:
python3-tornado-5.0.2-4.amzn2.0.8.src
x86_64:
python3-tornado-5.0.2-4.amzn2.0.8.x86_64
python3-tornado-doc-5.0.2-4.amzn2.0.8.x86_64
python3-tornado-debuginfo-5.0.2-4.amzn2.0.8.x86_64