CVE-2026-54463
7.5 · HIGHOverview
CVE-2026-54463 is a high-severity vulnerability affecting faye websocket-driver. It was published on July 17, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
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.
Remediation
Check the references section for vendor advisories and patches from faye. Update websocket-driver to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| faye | websocket-driver | >= 0, < 0.8.1 | Affected |
Frequently Asked Questions
What is CVE-2026-54463?
CVE-2026-54463 is a high-severity vulnerability affecting faye websocket-driver. It was published on July 17, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-54463?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-54463?
Check the references section for vendor advisories and patches from faye. Update websocket-driver to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-54463?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-54463 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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