CVE-2026-35536

Name: CVE-2026-35536
Creator: NVD / NIST
Published: 2026-04-03T04:16:53.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2026-35536 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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 estimates a 0.24% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.24%

14.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-159

Affected Software

Vendor	Product	Versions
Tornadoweb	Tornado	< 6.5.5

References

Timeline

Published: Apr 3, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is 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.

How severe is CVE-2026-35536?

CVE-2026-35536 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2026-35536?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-35536?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST