https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-08T02:10:19.622600+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2020-7663 CVE-2020-7663 2026-10-08T02:10:19.875930+00:00

Affected: websocket-extensions (ruby)

websocket-extensions ruby module prior to 0.1.5 allows Denial of Service (DoS) via Regex Backtracking. The extension parser may take quadratic time when parsing a header containing an unclosed string parameter value whose content is a repeating two-byte sequence of a backslash and some other character. This could be abused by an attacker to conduct Regex Denial Of Service (ReDoS) on a single-threaded server by providing a malicious payload with the Sec-WebSocket-Extensions header.

 https://vulnerability.circl.lu/vuln/usn-4502-1 USN-4502-1 — ruby-websocket-extensions vulnerability 2026-10-08T02:10:19.876038+00:00

Affected: Ubuntu:16.04:LTS: ruby-websocket-extensions, Ubuntu:18.04:LTS: ruby-websocket-extensions, Ubuntu:20.04:LTS: ruby-websocket-extensions

It was discovered that websocket-extensions does not properly parse special headers. A remote attacker could use this issue to cause regex backtracking, resulting in a denial of service. (CVE-2020-7663)