{"id":11321,"date":"2026-09-04T18:53:10","date_gmt":"2026-09-04T10:53:10","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-78207"},"modified":"2026-09-04T18:53:10","modified_gmt":"2026-09-04T10:53:10","slug":"cve-2026-78207","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-78207","title":{"rendered":"CVE-2026-78207 [CRITICAL] &#8211; exceljs through 4.4.0 contains a prototype pollution vulnerability in the deepMerge helper"},"content":{"rendered":"<p>exceljs through 4.4.0 contains a prototype pollution vulnerability in the deepMerge helper that fails to reject __proto__, constructor, or prototype keys when merging note objects. Attackers can assign parsed JSON with a malicious __proto__ property to cell notes, modifying Object.prototype and affecting all plain objects created in the process.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>exceljs through 4.4.0 contains a prototype pollution vulnerability in the deepMerge helper that fails to reject __proto__, constructor, or prototype keys when merging note objects. Attackers can assig<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-11321","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/11321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}