https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-04T18:30:43.750382+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2017-7820 CVE-2017-7820 2026-10-04T18:30:43.768766+00:00

Affected: Mozilla Firefox

The "instanceof" operator can bypass the Xray wrapper mechanism. When called on web content from the browser itself or an extension the web content can provide its own result for that operator, possibly tricking the browser or extension into mishandling the element. This vulnerability affects Firefox < 56.