ALAS2023-2026-1821

References: CVE-2026-2297  CVE-2026-6019 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

The import hook in CPython that handles legacy *.pyc files (SourcelessFileLoader) is incorrectly handled in FileLoader (a base class) and so does not use io.open_code() to read the .pyc files. sys.audit handlers for this audit event therefore do not fire. (CVE-2026-2297)

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)

Issue Correction:
Run dnf update python3.12 --releasever 2023.12.20260608 or dnf update --advisory ALAS2023-2026-1821 --releasever 2023.12.20260608 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation

New Packages:

aarch64:
    python3.12-tkinter-3.12.13-2.amzn2023.0.2.aarch64
    python3.12-devel-3.12.13-2.amzn2023.0.2.aarch64
    python3.12-3.12.13-2.amzn2023.0.2.aarch64
    python3.12-idle-3.12.13-2.amzn2023.0.2.aarch64
    python3.12-debugsource-3.12.13-2.amzn2023.0.2.aarch64
    python3.12-debug-3.12.13-2.amzn2023.0.2.aarch64
    python3.12-debuginfo-3.12.13-2.amzn2023.0.2.aarch64
    python3.12-libs-3.12.13-2.amzn2023.0.2.aarch64
    python3.12-test-3.12.13-2.amzn2023.0.2.aarch64

src:
    python3.12-3.12.13-2.amzn2023.0.2.src

x86_64:
    python3.12-devel-3.12.13-2.amzn2023.0.2.x86_64
    python3.12-tkinter-3.12.13-2.amzn2023.0.2.x86_64
    python3.12-debugsource-3.12.13-2.amzn2023.0.2.x86_64
    python3.12-3.12.13-2.amzn2023.0.2.x86_64
    python3.12-idle-3.12.13-2.amzn2023.0.2.x86_64
    python3.12-debug-3.12.13-2.amzn2023.0.2.x86_64
    python3.12-debuginfo-3.12.13-2.amzn2023.0.2.x86_64
    python3.12-libs-3.12.13-2.amzn2023.0.2.x86_64
    python3.12-test-3.12.13-2.amzn2023.0.2.x86_64