ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-103263

Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink

Published Oct 1, 2026 · catalog updated Oct 1, 2026 · Tornado before 6.5.9 StaticFileHandler

Check if you run it

No confirmed exploitation is on record for CVE-2026-103263. EPSS is 0.52%. Act only if a listed version of Tornado before 6.5.9 StaticFileHandler is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Tornado before 6.5.9 StaticFileHandler).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.52%
Remediation
Advisory link
Affected products
vendor tornadoweb tornado

Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the process user.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor tornadoweb tornadoversion unspecified

How to fix CVE-2026-103263

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-103263. EPSS is 0.52%. Act only if a listed version of Tornado before 6.5.9 StaticFileHandler is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-59: Link Following. EPSS 0.52%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ubuntu security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 1, 2026 · CVE.org

    Updated

    Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the

  2. Oct 22, 2026 · Ubuntu Security Notices

    Detected

    CVE-2026-103263 is listed by USN-8952-1: Tornado vulnerabilities.

Sources

  • CVE.orgVulnerability recordCVE-2026-103263

    Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated atta

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-103263

    30-day exploitation probability 0.52%

    first.org
  • Ubuntu Security NoticesVendor advisoryCVE-2026-103263

    It was discovered that Tornado did not properly handle certain HTTP requests and network inputs. An attacker could possibly use these issues to cause a denial of service, expose sensitive information, or bypass access controls. (CVE-2023-54397, CVE-2024-14029, CVE-2026-91990, CVE

    ubuntu.com

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.