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CVE-2026-54466— websocket-driver: Message corruption via abuse of protocol length headers

Quick assessment

Affected
faye websocket-driver-node
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

faye websocket-driver是faye团队的一个WebSocket协议驱动库。 faye websocket-driver 0.7.5之前版本存在输入验证错误漏洞，该漏洞源于WebSocket协议草稿版本中的帧格式包含长度标头，允许将任意大的整数编码为高位设置的字节序列，导致服务器在解析过程中精度丢失和payload解析错误。

AI Predicted 5.3 Difficulty: Easy EPSS 0.38% · P30

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
faye websocket-driver-node < 0.7.5 affected
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I. Basic Information for CVE-2026-54466

Vulnerability Information
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Vulnerability Title
websocket-driver: Message corruption via abuse of protocol length headers
Source: CVE Program / CVE List V5
Vulnerability Description
websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.7.5, the frame format in draft versions of the WebSocket protocol includes a length header that allows an arbitrarily large integer to be encoded as a sequence of bytes with the high bit set. By sending an indefinite sequence of bytes with values 0x80 or above, a client can make the server parse these bytes into an ever-growing integer in lib/websocket/driver/draft75.js; because JavaScript numbers are 64-bit floating point values, this number will eventually lose precision and lead to the subsequent payload being parsed incorrectly. This issue is fixed in version 0.7.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
长度参数不一致性处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
faye websocket-driver 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
faye websocket-driver是faye团队的一个WebSocket协议驱动库。 faye websocket-driver 0.7.5之前版本存在输入验证错误漏洞，该漏洞源于WebSocket协议草稿版本中的帧格式包含长度标头，允许将任意大的整数编码为高位设置的字节序列，导致服务器在解析过程中精度丢失和payload解析错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
faye websocket-driver-node < 0.7.5 -

II. Public POCs for CVE-2026-54466

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III. Intelligence Information for CVE-2026-54466

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Patches & Fixes for CVE-2026-54466 (1)

Vendor Advisories for CVE-2026-54466 (1)

Same Patch Batch · faye · 2026-07-17 · 5 CVEs total

CVE-2026-54463 websocket-driver: Memory exhaustion via abuse of protocol length headers
CVE-2026-54464 websocket-driver: Resource limit bypass via message compression
CVE-2026-54465 websocket-driver: Memory exhaustion in HTTP header parser
CVE-2026-54490 websocket-driver: Resource limit bypass via message compression

IV. Related Vulnerabilities

Same product: websocket-driver-node
Same vendor: faye
Same weakness: CWE-130

V. Comments for CVE-2026-54466

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