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CVE-2026-54464

MEDIUM
6.3
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-54464
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-15 15:30 UTC
Published
2026-07-17 20:03 UTC
Last updated
2026-07-17 20:03 UTC
Primary CWE
CWE-770
CWE-770: Allocation of Resources Without Limits or Throttlin…
Vendor / Product
faye / websocket-driver-ruby
Sources
cve.org  ·  NVD

Severity & Metrics

6.3 MEDIUM CVSS 4.0
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
Affected products (1)
VendorProductPlatformVersions
faye websocket-driver-ruby < 0.8.1
Weakness (CWE)
CWESourceDescription
CWE-770 cna CWE-770: Allocation of Resources Without Limits or Throttling
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.3 MEDIUM 4.0 cna 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
References (2)
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