CVE-2026-16052

Published Nov 12, 2026 Modified Nov 12, 2026 CWE-74

Description

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.

Is your site exposed to CVE-2026-16052?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-74 CWE-74

References

Frequently Asked Questions

What is 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.
How do I check if I'm vulnerable to CVE-2026-16052? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2026-16052 — free, no signup required.

Patch and protect

Block known exploits with a web application firewall while you patch, keep your own devices clean, or test the fix on a fresh server.

Compare VPS prices →

Affiliate links: we may earn a commission, your price stays the same.