{"id":40879,"date":"2026-10-18T20:31:16","date_gmt":"2026-10-18T12:31:16","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-112021"},"modified":"2026-10-18T20:31:16","modified_gmt":"2026-10-18T12:31:16","slug":"cve-2026-112021","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-112021","title":{"rendered":"CVE-2026-112021 [HIGH] &#8211; snac2 before 2.93 contains a heap-based buffer overflow vulnerability in _xs_json_load_lex"},"content":{"rendered":"<p>snac2 before 2.93 contains a heap-based buffer overflow vulnerability in _xs_json_load_lexer() that allows unauthenticated remote attackers to corrupt heap memory by sending JSON strings containing a u0000 escape. Attackers can send a single crafted application\/activity+json POST to activitypub_post_handler(), which parses it before signature checks, overflowing heap allocations and crashing the server.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>snac2 before 2.93 contains a heap-based buffer overflow vulnerability in _xs_json_load_lexer() that allows unauthenticated remote attackers to corrupt heap memory by sending JSON strings containing a <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-40879","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/40879","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=40879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}