ALAS2023-2026-1995

References: CVE-2026-15308  CVE-2026-4360  CVE-2026-7774 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

The incremental HTML parser (html.parser.HTMLParser) allows for CPU
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data. (CVE-2026-15308)

In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function. (CVE-2026-4360)

tarfile.data_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() to write files outside the destination directory, subject to the permissions of the extracting process. (CVE-2026-7774)

Issue Correction:
Run dnf update python3.9 --releasever 2023.12.20260803 or dnf update --advisory ALAS2023-2026-1995 --releasever 2023.12.20260803 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:
    python3-3.9.25-1.amzn2023.0.9.aarch64
    python3.9-debugsource-3.9.25-1.amzn2023.0.9.aarch64
    python3-tkinter-3.9.25-1.amzn2023.0.9.aarch64
    python3-devel-3.9.25-1.amzn2023.0.9.aarch64
    python3-idle-3.9.25-1.amzn2023.0.9.aarch64
    python3-debug-3.9.25-1.amzn2023.0.9.aarch64
    python3.9-debuginfo-3.9.25-1.amzn2023.0.9.aarch64
    python3-libs-3.9.25-1.amzn2023.0.9.aarch64
    python3-test-3.9.25-1.amzn2023.0.9.aarch64

noarch:
    python-unversioned-command-3.9.25-1.amzn2023.0.9.noarch

src:
    python3.9-3.9.25-1.amzn2023.0.9.src

x86_64:
    python3-3.9.25-1.amzn2023.0.9.x86_64
    python3-devel-3.9.25-1.amzn2023.0.9.x86_64
    python3.9-debugsource-3.9.25-1.amzn2023.0.9.x86_64
    python3-tkinter-3.9.25-1.amzn2023.0.9.x86_64
    python3-idle-3.9.25-1.amzn2023.0.9.x86_64
    python3-debug-3.9.25-1.amzn2023.0.9.x86_64
    python3.9-debuginfo-3.9.25-1.amzn2023.0.9.x86_64
    python3-libs-3.9.25-1.amzn2023.0.9.x86_64
    python3-test-3.9.25-1.amzn2023.0.9.x86_64