Amazon Linux 2 Security Advisory: ALAS2-2026-3217
Advisory Released Date: 2026-04-01
Advisory Updated Date: 2026-04-01
The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output(). (CVE-2026-3644)
When an Expat parser with a registered ElementDeclHandler parses an inline
document type definition containing a deeply nested content model a C stack
overflow occurs. (CVE-2026-4224)
Affected Packages:
python3
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 or yum update --advisory ALAS2-2026-3217 to update your system.
aarch64:
python3-3.7.16-1.amzn2.0.24.aarch64
python3-libs-3.7.16-1.amzn2.0.24.aarch64
python3-devel-3.7.16-1.amzn2.0.24.aarch64
python3-tools-3.7.16-1.amzn2.0.24.aarch64
python3-tkinter-3.7.16-1.amzn2.0.24.aarch64
python3-test-3.7.16-1.amzn2.0.24.aarch64
python3-debug-3.7.16-1.amzn2.0.24.aarch64
python3-debuginfo-3.7.16-1.amzn2.0.24.aarch64
i686:
python3-3.7.16-1.amzn2.0.24.i686
python3-libs-3.7.16-1.amzn2.0.24.i686
python3-devel-3.7.16-1.amzn2.0.24.i686
python3-tools-3.7.16-1.amzn2.0.24.i686
python3-tkinter-3.7.16-1.amzn2.0.24.i686
python3-test-3.7.16-1.amzn2.0.24.i686
python3-debug-3.7.16-1.amzn2.0.24.i686
python3-debuginfo-3.7.16-1.amzn2.0.24.i686
src:
python3-3.7.16-1.amzn2.0.24.src
x86_64:
python3-3.7.16-1.amzn2.0.24.x86_64
python3-libs-3.7.16-1.amzn2.0.24.x86_64
python3-devel-3.7.16-1.amzn2.0.24.x86_64
python3-tools-3.7.16-1.amzn2.0.24.x86_64
python3-tkinter-3.7.16-1.amzn2.0.24.x86_64
python3-test-3.7.16-1.amzn2.0.24.x86_64
python3-debug-3.7.16-1.amzn2.0.24.x86_64
python3-debuginfo-3.7.16-1.amzn2.0.24.x86_64