SB2026110837 - Ubuntu update for python-tornado

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Main Vulnerability Database SB2026110837

SB2026110837 - Ubuntu update for python-tornado

Published: November 8, 2026

Security Bulletin ID SB2026110837
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Path traversal (CVE-ID: CVE-2026-103263)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper path validation in tornado.web.StaticFileHandler when handling requests for paths that resolve through symbolic links. A remote attacker can request a path to a symbolic link within the static root to disclose sensitive information.

Exploitation requires a symbolic link within the static root that points outside that root.


Remediation

Install update from vendor's website.

References