CVE-2026-498545.3MediumCWE-126
Tornado: Out-of-bounds memory access in C extension
tornadoweb · tornado
Not in CISA KEV
0.4%probability of exploitation in the next 30 days
36th percentile
050100
Higher than 36% of scored CVEs
5.3MediumCVSS 3.1
LowMediumHighCrit.
DescriptionNVD
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.
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 16 Jun.
- Tornado fixes credential leak in redirect, urges immediate updateSecurityOnline · first in our coverage · mentions it in passing
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