CVEvulnerability
CVE-2026-49854
5.3 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-07-14
- Last modified
- 2026-10-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-126
Description
Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, the optional native extension tornado.speedups implemented websocket_mask without validating that the mask argument is exactly four bytes, allowing the C function to read up to three bytes beyond the provided buffer when reached through Tornado XSRF token decoding with the native extension active. This issue is fixed in version 6.5.6.
Related
Weakness · CWE (1)
- CWE-126 Buffer Over-read weakness
References
- https://github.com/tornadoweb/tornado/commit/96dc88c2a05705287856b2cd6b4b4034f9a6aaac github.com
- https://github.com/tornadoweb/tornado/pull/3626 github.com
- https://github.com/tornadoweb/tornado/releases/tag/v6.5.6 github.com
- https://github.com/tornadoweb/tornado/security/advisories/GHSA-cx3h-4qpv-8hc9 github.com