What is CVE-2026-35536?

CVE-2026-35536 is a high-severity vulnerability in Tornadoweb Tornado, classified under CWE-159. CVSS score: 7.2/10. Published 2026-04-03.

How severe is CVE-2026-35536?

High severity. CVSS v3 base score is 7.2 out of 10.

Vulnerability in Tornadoweb Tornado

CVE-2026-35536

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters.

EPSS: 0.000 (4.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Tornadoweb Tornado — versions 0

Weakness classification (CWE)

CWE-159

References

github.com/tornadoweb/tornado/security/advisories/GHSA-78cv-mqj4-43f7
github.com/tornadoweb/tornado/releases/tag/v6.5.5

Frequently asked questions

What is CVE-2026-35536?: CVE-2026-35536 is a high-severity vulnerability in Tornadoweb Tornado, classified under CWE-159. CVSS score: 7.2/10. Published 2026-04-03.
How severe is CVE-2026-35536?: High severity. CVSS v3 base score is 7.2 out of 10.