Amazon Linux 2 Security Advisory: ALAS2-2026-3366
Advisory Released Date: 2026-06-22
Advisory Updated Date: 2026-06-22
Severity:
Medium
Issue Overview:
http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value. (CVE-2026-6019)
Affected Packages:
python
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 or yum update --advisory ALAS2-2026-3366 to update your system.
New Packages:
aarch64:
python-2.7.18-1.amzn2.0.20.aarch64
python-libs-2.7.18-1.amzn2.0.20.aarch64
python-devel-2.7.18-1.amzn2.0.20.aarch64
python-tools-2.7.18-1.amzn2.0.20.aarch64
tkinter-2.7.18-1.amzn2.0.20.aarch64
python-test-2.7.18-1.amzn2.0.20.aarch64
python-debug-2.7.18-1.amzn2.0.20.aarch64
python-debuginfo-2.7.18-1.amzn2.0.20.aarch64
i686:
python-2.7.18-1.amzn2.0.20.i686
python-libs-2.7.18-1.amzn2.0.20.i686
python-devel-2.7.18-1.amzn2.0.20.i686
python-tools-2.7.18-1.amzn2.0.20.i686
tkinter-2.7.18-1.amzn2.0.20.i686
python-test-2.7.18-1.amzn2.0.20.i686
python-debug-2.7.18-1.amzn2.0.20.i686
python-debuginfo-2.7.18-1.amzn2.0.20.i686
src:
python-2.7.18-1.amzn2.0.20.src
x86_64:
python-2.7.18-1.amzn2.0.20.x86_64
python-libs-2.7.18-1.amzn2.0.20.x86_64
python-devel-2.7.18-1.amzn2.0.20.x86_64
python-tools-2.7.18-1.amzn2.0.20.x86_64
tkinter-2.7.18-1.amzn2.0.20.x86_64
python-test-2.7.18-1.amzn2.0.20.x86_64
python-debug-2.7.18-1.amzn2.0.20.x86_64
python-debuginfo-2.7.18-1.amzn2.0.20.x86_64