CVE-2026-6019
mediumpriority · track · 24EPSS 0.002 · 11 %ileDEEUFRRUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 0.5–6.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (35)
Products and version ranges known to be affected.
advisories (6)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-2455Oracle Solaris Drittanbieterkomponenten: Mehrere SchwachstellenDeutsch2026-07-21csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in verschiedenen Komponenten von Drittanbietern in Oracle Solaris ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
- BIT-libpython-2026-6019BaseCookie.js_output() does not neutralize embedded characters2026-06-25vendor · osvUS
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.
- BIT-python-2026-6019BaseCookie.js_output() does not neutralize embedded characters2026-06-25vendor · osvUS
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.
- BIT-python-min-2026-6019BaseCookie.js_output() does not neutralize embedded characters2026-06-25vendor · osvUS
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.
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
- PSF-2026-212026-04-22vendor · osvUS
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.
also known as (8)
Other names and identifiers for this entity.
- CNNVD-202604-4217cnnvd
- EUVD-2026-25079enisa_euvd
- BDU:2026-13663fstec_bdu
- GHSA-2755-2mm4-rm5cenisa_euvd
- BIT-libpython-2026-6019osv
- BIT-python-2026-6019osv
- BIT-python-min-2026-6019osv
- PSF-2026-21osv
sources
Which sources assert this record, and when.
references (14)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2026-6019cnnvd
- https://www.python.org/Patchcnnvd
- https://github.com/python/cpython/commit/3c59b8b53fc75c7f9578d16fb8201ceb43e8f76cenisa_euvd
- https://github.com/python/cpython/commit/76b3923d688c0efc580658476c5f525ec8735104enisa_euvd
- https://github.com/python/cpython/commit/f795e042043dfe26c42e1971d4502c1cdc4c65b8enisa_euvd
- https://github.com/python/cpython/issues/90309enisa_euvd
- https://github.com/python/cpython/pull/148848enisa_euvd
- https://mail.python.org/archives/list/security-announce@python.org/thread/IVNWGV2BBNC3RHQAFS22UP4DY56SAXX3/enisa_euvd
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