Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-54464— websocket-driver: Resource limit bypass via message compression

Quick assessment

Affected
faye websocket-driver-ruby
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 0.8.1之前版本存在资源管理错误漏洞，该漏洞源于在使用permessage-deflate扩展时，消息大小限制仅针对压缩数据长度进行检查，导致应用程序可能接受超出预期大小的消息，从而超出资源使用限制。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
faye websocket-driver-ruby < 0.8.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-54464

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
websocket-driver: Resource limit bypass via message compression
Source: CVE Program / CVE List V5
Vulnerability Description
### Impact If this library is used in tandem with the `permessage-deflate` extension, a WebSocket server or client can be made to accept messages that are larger than the configured maximum message size. This is because this limit is checked against the message frames' length headers, which give the size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage. ### Patches The issue has been patched in version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All users should upgrade to this version. ### Workarounds No known workarounds exist. ### Acknowledgements This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
faye websocket-driver 资源管理错误漏洞
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 0.8.1之前版本存在资源管理错误漏洞，该漏洞源于在使用permessage-deflate扩展时，消息大小限制仅针对压缩数据长度进行检查，导致应用程序可能接受超出预期大小的消息，从而超出资源使用限制。
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-ruby < 0.8.1 -

II. Public POCs for CVE-2026-54464

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-54464

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-54464 (1)

Vendor Advisories for CVE-2026-54464 (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-2026-54465 websocket-driver: Memory exhaustion in HTTP header parser
CVE-2026-54466 websocket-driver: Message corruption via abuse of protocol length headers
CVE-2026-54490 websocket-driver: Resource limit bypass via message compression

IV. Related Vulnerabilities

Same product: websocket-driver-ruby
Same vendor: faye
Same weakness: CWE-770

V. Comments for CVE-2026-54464

No comments yet

Leave a comment