CVE-2026-35536
Publication date 3 April 2026
Last updated 23 April 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| python-tornado | 25.10 questing |
Fixed 6.4.2-3ubuntu0.3
|
| 24.04 LTS noble |
Fixed 6.4.0-1ubuntu0.5
|
|
| 22.04 LTS jammy |
Fixed 6.1.0-3ubuntu0.1~esm5
|
|
| 20.04 LTS focal |
Fixed 6.0.3+really5.1.1-3ubuntu0.1~esm5
|
|
| 18.04 LTS bionic |
Fixed 4.5.3-1ubuntu0.2+esm3
|
|
| 16.04 LTS xenial |
Fixed 4.2.1-1ubuntu3.1+esm3
|
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| Parameter | Value |
|---|---|
| Base score |
7.2 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Changed |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-8198-1
- Tornado vulnerabilities
- 22 April 2026