CVE-2026-103263

Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink

HIGH 8.2

At a glance

Source: NVD
EPSS: EPSS 0.52 % · percentile 44 (2026-10-28)
State: PUBLISHED
Published: 2026-10-01 10:42 UTC
Updated: 2026-10-01 19:29 UTC
Assigner: VulnCheck
NVD status: Deferred

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.

Weaknesses (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

Scores

Version	Score	Vector	Scored by
CVSS 4.0	HIGH 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	VulnCheck
CVSS 3.1	MEDIUM 5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	VulnCheck
CVSS 4.0	HIGH 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	MEDIUM 5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	NVD · disclosure@vulncheck.com (Secondary)

Advisories

GHSA-c2m8-h5v5-343r — Tornado: StaticFileHandler follows symlinks outside static root (path traversal)

European references

ENISA EUVD · EUVD-2026-90657
GCVE · GCVE-0-2026-103263

Affected products

Product	Versions
tornadoweb · tornado	affected 0 < 6.5.9 ; unaffected 6.5.9

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD