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MEDIUM

CVE-2026-103263

Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink

CVSS v3

5.9

MEDIUM

EPSS Score

0.5 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

poc

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • tornadoPyPIall versions · fixed in 6.5.9

Vendor advisories

  • CVE-2026-103263 Red Hat Product Security71 known affected

    tornado: Tornado: Information disclosure via symlink path traversal in StaticFileHandler

    lightspeed-core/lightspeed-stack-rhel9 as a component of Lightspeed Core · lightspeed-core/rag-tool-cpu-rhel9 as a component of Lightspeed Core · lightspeed-core/rag-tool-cuda-12.9-rhel9 as a component of Lightspeed Core

Full record on NVD

Description

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2026-10-01
Last Modified
2026-10-01

Frequently asked questions

What is CVE-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 attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the process user.

Is CVE-2026-103263 actively exploited?

A proof-of-concept exploit exists for CVE-2026-103263, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-103263?

CVE-2026-103263 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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