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.

CVSS 4.0

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

CVSS 3.1

5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-25)

CWE

CWE-59

Published

2026-10-01

Modified

2026-10-01

Record from

the NVD, synced 2026-10-19

Packages (OSV)

References

• https://github.com/tornadoweb/tornado/commit/437ab5f76565403b3403438d2e555d11f8128d32
• https://github.com/tornadoweb/tornado/security/advisories/GHSA-c2m8-h5v5-343r
• https://www.vulncheck.com/advisories/tornado-before-6.5.9-staticfilehandler-path-traversal-via-symlink
• https://github.com/tornadoweb/tornado/security/advisories/GHSA-c2m8-h5v5-343r

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