Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-6019: 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-2026-2297: 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.
Fixed packages 9
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | python3.12 | 0:3.12.13-2.amzn2023.0.2 |
| Amazon Linux · 2023 | python3.12-debug | 0:3.12.13-2.amzn2023.0.2 |
| Amazon Linux · 2023 | python3.12-debuginfo | 0:3.12.13-2.amzn2023.0.2 |
| Amazon Linux · 2023 | python3.12-debugsource | 0:3.12.13-2.amzn2023.0.2 |
| Amazon Linux · 2023 | python3.12-devel | 0:3.12.13-2.amzn2023.0.2 |
| Amazon Linux · 2023 | python3.12-idle | 0:3.12.13-2.amzn2023.0.2 |
| Amazon Linux · 2023 | python3.12-libs | 0:3.12.13-2.amzn2023.0.2 |
| Amazon Linux · 2023 | python3.12-test | 0:3.12.13-2.amzn2023.0.2 |
| Amazon Linux · 2023 | python3.12-tkinter | 0:3.12.13-2.amzn2023.0.2 |
Vulnerabilities 2
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Medium 5.7
SourcelessFileLoader does not use io.open_code()
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.
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Low 2.1
BaseCookie.js_output() does not neutralize embedded characters
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 …