{"id":39891,"date":"2026-10-16T04:34:05","date_gmt":"2026-10-15T20:34:05","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-109413"},"modified":"2026-10-16T04:34:05","modified_gmt":"2026-10-15T20:34:05","slug":"cve-2026-109413","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-109413","title":{"rendered":"CVE-2026-109413 &#8211; In Symfony YAML prior to versions\u00a05.4.54,\u00a06.4.45,\u00a07.4.18, and\u00a08.1.6,\u00a0YamlParser::lexInlin"},"content":{"rendered":"<p>In Symfony YAML prior to versions\u00a05.4.54,\u00a06.4.45,\u00a07.4.18, and\u00a08.1.6,\u00a0YamlParser::lexInlineStructure() recursed through lexInlineMapping() and lexInlineSequence() for every { and [ of an inline collection, without entering the nesting level that the rest of the parser bounds with maxNestingLevel. A document made of deeply nested inline collections, such as [[[[&#8230;]]]], exhausted the stack while it was being lexed: depending on the PHP version and its stack settings, the process crashed or the request ended with a fatal error.<\/p>\n<p>Any code parsing untrusted YAML is affected. That includes #[MapRequestPayload] when the Yaml component is installed and the endpoint does not restrict acceptFormat: a single unauthenticated request with a YAML content type is enough.<\/p>\n<p>This issue affects symfony\/yaml\u00a0through v5.4.53, v6.0.0-BETA1 through\u00a0v6.4.44, v7.0.0-BETA1 through\u00a0v7.4.17, and v8.0.0-BETA1 through\u00a0v8.1.5.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Symfony YAML prior to versions\u00a05.4.54,\u00a06.4.45,\u00a07.4.18, and\u00a08.1.6,\u00a0YamlParser::lexInlineStructure() recursed through lexInlineMapping() and lexInlineSequence() for every { and [ of an inline collec<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-39891","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/39891","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=39891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=39891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=39891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}