{"id":182651,"date":"2026-07-16T04:53:25","date_gmt":"2026-07-16T02:53:25","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-nginx-1-31-3-s-ustraneniem-rce-uyazvimosti"},"modified":"2026-07-16T04:53:25","modified_gmt":"2026-07-16T02:53:25","slug":"obnovlenie-nginx-1-31-3-s-ustraneniem-rce-uyazvimosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/obnovlenie-nginx-1-31-3-s-ustraneniem-rce-uyazvimosti","title":{"rendered":"nginx 1.31.3 update addressing RCE vulnerability","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>The release of the main branch nginx 1.31.3 has been formed, within which the development of new features continues, as well as the release of the parallel stable branch nginx 1.30.4, to which only changes related to fixing serious bugs and vulnerabilities are made. The updates fixed 3 vulnerabilities:    <\/p>\n<ul>\n<li class=\"l\"> CVE-2026-42533 \u2014 a buffer overflow occur when using the 'map' directive with regular expression checks through substitutions using unnamed (e.g., $1 and $2) or named variables, provided that those variables are referenced before the map result variable or an uncached variable is used. This vulnerability can potentially lead to remote code execution on <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/en\/server\/dts-dronten\/\" title=\"server\" data-wpil-keyword-link=\"linked\">server<\/a> by sending a specially crafted HTTP request. The issue has been assigned a critical danger level of 9.2 out of 10.\n<li class=\"l\"> CVE-2026-60005 \u2014 a leak of uninitialized memory in the worker process when using the ngx_http_slice_module and specifying substitutions in the slice directive with unnamed variables in regular expressions. The vulnerability has been assigned a severity level of 8.8 out of 10.\n<li class=\"l\"> CVE-2026-56434 \u2014 a use-after-free memory issue in the ngx_http_ssi_module that occurs when processing a specially crafted response returned by a proxied backend. This vulnerability can lead to the modification of the memory content of the worker process. The issue has been assigned a severity level of 8.3 out of 10.        <\/ul>\n<p>Non-vulnerability-related changes:  <\/p>\n<ul>\n<li class=\"l\">  The ngx_http_xslt_filter_module has disabled loading variables in XML documents whose values are loaded from external sources. The 'xml_external_entities' directive has been added to control the loading of external components specified in the DTD block of the processed XML document.\n<li class=\"l\"> New directives 'proxy_socket_sndbuf', 'proxy_socket_rcvbuf', 'fastcgi_socket_sndbuf', 'fastcgi_socket_rcvbuf', 'grpc_socket_sndbuf', 'grpc_socket_rcvbuf', 'scgi_socket_sndbuf', 'scgi_socket_rcvbuf', 'uwsgi_socket_sndbuf', 'uwsgi_socket_rcvbuf', 'tunnel_socket_sndbuf' and 'tunnel_socket_rcvbuf' have been added to set the sizes of send (SO_SNDBUF) and receive (SO_RCVBUF) buffers.\n<li class=\"l\"> For the LoongArch64 architecture, a definition of the block size (cache line) used for data transfer between the CPU cache and memory has been implemented.\n<li class=\"l\"> The ngx_http_proxy_v2_module and ngx_http_grpc_module modules implement a limitation on the size of headers and trailers in HTTP\/2 responses using the directives proxy_buffer_size and grpc_buffer_size.      <\/ul>\n<p>Source: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65910\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 nginx 1.31.3, \u0432 \u0440\u0430\u043c\u043a\u0430\u0445 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442\u0441\u044f \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435 \u043d\u043e\u0432\u044b\u0445 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0430\u0440\u0430\u043b\u043b\u0435\u043b\u044c\u043d\u043e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 nginx 1.30.4, \u0432 \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u0432\u043d\u043e\u0441\u044f\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0435 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0441\u0435\u0440\u044c\u0451\u0437\u043d\u044b\u0445 \u043e\u0448\u0438\u0431\u043e\u043a \u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u0412 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e 3 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2026-42533 &#8212; \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430, \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0449\u0435\u0435\u0441\u044f \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0432 \u0434\u0438\u0440\u0435\u043a\u0442\u0438\u0432\u0435 &#171;map&#187; \u043f\u0440\u043e\u0432\u0435\u0440\u043e\u043a \u0447\u0435\u0440\u0435\u0437 \u0440\u0435\u0433\u0443\u043b\u044f\u0440\u043d\u044b\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f \u0441 \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0430\u043c\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-182651","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" 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