CVE-2026-35536

Aliases:GHSA-fqwm-6jpj-5wxcECHO-b644-e810-f4a8GHSA-78cv-mqj4-43f7PYSEC-2026-2287UBUNTU-CVE-2026-35536DEBIAN-CVE-2026-35536CGA-86hh-v9p4-xm88CGA-hxv9-343f-w56p
Advisory lineage Upstream: 0 Downstream: 14
Analyzed
Published: 03 Apr 2026, 02:25
Last modified:03 Apr 2026, 13:12

Vulnerability Summary

Overall Risk (default)
medium
29/100
CVSS Score
7.2 HIGH
v3.1 (cve.org)
EPSS Score
0.24% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Apr 2026, 02:25
Published
Vulnerability first disclosed
03 Apr 2026, 13:12
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Trends

Current EPSS score: 0.24%• Percentile: 15%

Techniques & Countermeasures

  • CWE-159•Improper Handling of Invalid Use of Special Elements

    The product does not properly filter, remove, quote, or otherwise manage the invalid use of special elements in user-controlled input, which could cause adverse effect on its behavior and integrity.

Affected Systems

  • chainguard•mitmproxy

    < 12.2.2-r1

  • wolfi•mitmproxy

    < 12.2.2-r1

  • debian•python-tornado

    < 6.1.0-1+deb11u4 | all | all | < 6.5.5-1

  • ubuntu•python-tornado

    < 4.2.1-1ubuntu3.1+esm3 | < 4.5.3-1ubuntu0.2+esm3 | < 6.1.0-3ubuntu0.1~esm5 | < 6.4.0-1ubuntu0.5 | < 6.4.2-3ubuntu0.3 | < 6.5.4-0.1ubuntu0.1

  • PyPI•tornado

    < 6.5.5

  • tornadoweb•tornado

    < 6.5.5

References (12)