Amazon Linux 2023 Security Advisory: ALAS2023-2026-2148
Advisory Released Date: 2026-09-14
Advisory Updated Date: 2026-09-14
Severity:
Important
Issue Overview:
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.render_token() can exceed Python's recursion limit and raise RecursionError, allowing crafted Markdown to crash a parsing process. This issue is fixed in version 3.3.3 (CVE-2026-76098)
Affected Packages:
python-mistune
Issue Correction:
Run dnf update python-mistune --releasever 2023.12.20260914 or dnf update --advisory ALAS2023-2026-2148 --releasever 2023.12.20260914 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:
python-mistune-debugsource-0.8.3-14.amzn2023.0.4.aarch64
python3-mistune-debuginfo-0.8.3-14.amzn2023.0.4.aarch64
python3-mistune-0.8.3-14.amzn2023.0.4.aarch64
src:
python-mistune-0.8.3-14.amzn2023.0.4.src
x86_64:
python3-mistune-debuginfo-0.8.3-14.amzn2023.0.4.x86_64
python-mistune-debugsource-0.8.3-14.amzn2023.0.4.x86_64
python3-mistune-0.8.3-14.amzn2023.0.4.x86_64