Is there a public exploit for CVE-2026-16052?

No public exploit for CVE-2026-16052 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-16052?

CVE-2026-16052 scores CVSS 2.3 (v4.0), rated low.

What does CVE-2026-16052 affect?

CVE-2026-16052 affects Python Software Foundation CPython.

2.3 Low

The http.cookies.Morsel class allows separator semicolons in attribute values and includes them verbatim in all output formats.

CVE-2026-16052

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.

Assessment

CVSS: 2.3 (v4.0)
Severity: Low
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 12 November 2026
Last updated: 12 November 2026
Affected: Python Software Foundation · CPython
Assigner: PSF

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

At the source

EUVD (ENISA)

References

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