CVE-2026-35536
High
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.
SeverityHigh
CVSS7.2
Exploit probability—
ProductTornado
PublishedApr 3, 2026
First seenApr 3, 2026
Weakness typeCWE-159CWE-159
How to fix
Update
- tornadoweb tornado6.5.5 or later
- tornado6.5.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| tornadoweb tornado | v < 6.5.5 | 6.5.5 |
| tornadoPyPI | v < 6.5.5 | 6.5.5 |
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