inside the generated script element. Mitigation base64-encodes th","datePublished":"2026-04-22T19:28:08.720000+00:00","dateModified":"2026-06-10T18:58:07.798000+00:00","inLanguage":"pt","author":{"@type":"Organization","name":"Vexday"},"publisher":{"@type":"Organization","name":"Vexday","url":"https://vexday.io"},"mainEntityOfPage":"https://vexday.io/pt/cve/CVE-2026-6019","keywords":"CVE-2026-6019, CWE-150","breadcrumb":{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Início","item":"https://vexday.io/pt"},{"@type":"ListItem","position":2,"name":"CVE-2026-6019"}]}}← voltar

CVE-2026-6019

BaseCookie.js_output() does not neutralize embedded characters

CVSS 2.1 LOWEPSS 0.2%CWE-150

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.

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Produtos afetados

Python Software Foundation · CPython

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Referências

https://github.com/python/cpython/commit/3c59b8b53fc75c7f9578d16fb8201ceb43e8f76chttps://github.com/python/cpython/commit/76b3923d688c0efc580658476c5f525ec8735104https://github.com/python/cpython/commit/f795e042043dfe26c42e1971d4502c1cdc4c65b8https://github.com/python/cpython/issues/90309https://github.com/python/cpython/pull/148848https://mail.python.org/archives/list/security-announce@python.org/thread/IVNWGV2BBNC3RHQAFS22UP4DY56SAXX3/