CVE-2026-16052: Cookie Attribute Injection via Unescaped Semicolons in http.cookies.Morsel
Python Software Foundation · CPython
Vendor fix available · Affected: Python Software Foundation CPython · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 23% of scored CVEs
DescriptionCVE.org
The http.cookies.Morsel class allows separator semicolons in attribute values and includes them verbatim in all output formats. An attacker who can control these values could use this to relax the cookie's Domain or SameSite restrictions.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Python Software Foundation · CPythonbefore 3.16.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-16052 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.