{"id":"CVE-2026-54463","aliases":["GHSA-ghhp-3qvg-889p"],"title":"websocket-driver: Memory exhaustion via abuse of protocol length headers","summary":"websocket-driver: Memory exhaustion via abuse of protocol length headers","severity":"medium","cwe":["CWE-400"],"vendor":"websocket-driver","product":"websocket-driver","ecosystem":"rubygems","affected":["websocket-driver < 0.8.1"],"patched":["websocket-driver 0.8.1"],"published":"2026-07-15","updated":"2026-07-15","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-ghhp-3qvg-889p","references":[{"url":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-ghhp-3qvg-889p"},{"url":"https://github.com/faye/websocket-driver-ruby/releases/tag/0.8.1"},{"url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/websocket-driver/CVE-2026-54463.yml"},{"url":"https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54463"},{"url":"https://github.com/advisories/GHSA-ghhp-3qvg-889p"}],"tags":["ghsa","rubygems"],"ingestedAt":"2026-07-15T22:46:58.848Z","epss":0.00344,"epssPercentile":0.2801,"slug":"CVE-2026-54463","body":"## Overview\n\n### Impact\n\nThe 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 server or client can make the other peer parse these bytes into an ever-growing integer. Since Ruby integers are arbitrary precision, this can be used to make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory.\n\n### Patches\n\nThe issue has been patched in version 0.8.1. All users should upgrade to this version.\n\n### Workarounds\n\nNo known workarounds exist.\n\n### Acknowledgements\n\nThis issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.\n\n## Affected packages\n\n- `websocket-driver < 0.8.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `websocket-driver 0.8.1`","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}