CVE-2026-6019
Medium
Description
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.
SeverityMedium
CVSS6.1
Exploit probability—
Product
Python
PublishedApr 22, 2026
First seenApr 22, 2026
Weakness typeCWE-150CWE-150
How to fix
Update
- python python3.13.14 or later
Patches
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python python | v < 3.13.14, 3.14.0 ≤ v ≤ 3.14.4, 3.15.0 | 3.13.14 |
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