High severity7.5NVD Advisory· Published Jul 17, 2026· Updated Aug 6, 2026
CVE-2026-54463
CVE-2026-54463
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
websocket-driverRubyGems | < 0.8.1 | 0.8.1 |
Affected products
4- ghsa-coords2 versions
< 0.8.1+ 1 more
- (no CPE)range: < 0.8.1
- (no CPE)range: < 18.1.6-r29
- Range: <0.8.1
Patches
Vulnerability mechanics
References
7- github.com/faye/websocket-driver-ruby/commit/d0141f041f6e3677a951255d547a313e732ccbe0nvdPatchWEB
- github.com/advisories/GHSA-ghhp-3qvg-889pghsaADVISORY
- github.com/faye/websocket-driver-ruby/security/advisories/GHSA-ghhp-3qvg-889pnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-54463ghsaADVISORY
- github.com/faye/websocket-driver-ruby/releases/tag/0.8.1ghsaWEB
- github.com/rubysec/ruby-advisory-db/blob/master/gems/websocket-driver/CVE-2026-54463.ymlghsaWEB
- www.cve.org/CVERecord/SearchResultsghsaWEB
News mentions
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