DEBIAN-CVE-2026-123535

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Source
https://security-tracker.debian.org/tracker/CVE-2026-123535
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123535.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-123535
Upstream
Published
2026-11-08T02:16:43Z
Modified
2026-11-08T14:00:06Z
Severity
  • 4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

Tornado before 6.6 does not validate the max_age argument of RequestHandler.set_cookie (also called by set_signed_cookie, set_secure_cookie, and clear_cookie), allowing injection of additional Set-Cookie attributes. When an application passes attacker-influenced input as max_age, an attacker can embed attributes such as Domain, Path, or Secure to widen the cookie's scope to parent paths or other subdomains.

References

Affected packages

Debian:12 / python-tornado

Package

Name
python-tornado
Purl
pkg:deb/debian/python-tornado?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.2.0-3
6.2.0-3+deb12u1
6.2.0-3+deb12u2
6.2.0-3+deb12u3
6.2.0-3+deb12u4
6.3.2-1
6.4.0-1
6.4.0-2
6.4.1-1
6.4.1-2
6.4.1-3
6.4.2-1
6.4.2-2
6.4.2-3
6.5.2-1
6.5.2-2
6.5.2-3
6.5.4-0.1
6.5.4-1
6.5.5-1
6.5.5-2
6.5.5-3
6.5.5-4
6.5.5-5
6.6.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123535.json"

Debian:13 / python-tornado

Package

Name
python-tornado
Purl
pkg:deb/debian/python-tornado?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.4.2-3
6.4.2-3+deb13u1
6.4.2-3+deb13u2
6.5.2-1
6.5.2-2
6.5.2-3
6.5.4-0.1
6.5.4-1
6.5.5-1
6.5.5-2
6.5.5-3
6.5.5-4
6.5.5-5
6.6.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123535.json"

Debian:14 / python-tornado

Package

Name
python-tornado
Purl
pkg:deb/debian/python-tornado?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.4.2-3
6.5.2-1
6.5.2-2
6.5.2-3
6.5.4-0.1
6.5.4-1
6.5.5-1
6.5.5-2
6.5.5-3
6.5.5-4
6.5.5-5
6.6.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123535.json"