Vulnerability in Python Cpython
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…
EPSS: 0.001 (19.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
Weakness classification (CWE)
References
- cna@python.org (Patch, patch, Issue Tracking)
- cna@python.org (issue-tracking, Exploit, Issue Tracking)
- cna@python.org (vendor-advisory, Mailing List, Vendor Advisory)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
Frequently asked questions
- What is CVE-2026-6019?
- CVE-2026-6019 is a medium-severity vulnerability in Python Cpython, classified under CWE-150. CVSS score: 6.1/10. Published 2026-04-22.
- How severe is CVE-2026-6019?
- Medium severity. CVSS v3 base score is 6.1 out of 10.