Amazon Linux 2023 : python3.13, python3.13-devel, python3.13-freethreading (ALAS2023-2026-1786)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1786 advisory. http.cookies.Morsel.jsoutput returns an inline snippet and only escapes for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence inside the generated script element...

CVE-2026-6019 BaseCookie.js_output() does not neutralize embedded characters

http.cookies.Morsel.jsoutput returns an inline snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value...

PT-2026-34549

Name of the Vulnerable Software and Affected Versions Python affected versions not specified Description The js output function in http.cookies.Morsel returns an inline snippet that only escapes double quotes for JavaScript string context. It fails to neutralize the HTML parser-sensitive sequence...