CVE-2026-103263

Summary

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.

Affected Software

Weaknesses

• CWE-59: Improper Link Resolution Before File Access ('Link Following')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/tornadoweb/tornado/security/advisories/GHSA-c2m8-h5v5-343r

References

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

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