CVE WatchJul 17, 2026

CVE-2026-54463

websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, draft versions of the WebSocket protocol in websocket-d

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Jul 17, 2026 · Last modified: Jul 17, 2026 · CWE-770

EPSS · 30d

Not enough EPSS history yet.

Technical description

websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, draft versions of the WebSocket protocol in websocket-driver include a length header that allows an arbitrarily large integer to be encoded as bytes with the high bit set, and a server or client can send an indefinite sequence of 0x80 or higher bytes that the peer parses into an ever-growing Ruby integer. This can make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory. This issue is fixed in version 0.8.1.

Official references

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