{"id":48590,"date":"2025-06-03T20:07:38","date_gmt":"2025-06-03T20:07:38","guid":{"rendered":""},"modified":"2025-10-21T10:42:47","modified_gmt":"2025-10-21T16:42:47","slug":"cve-2025-4366-request-smuggling-vulnerability-in-pingora-s-proxying-framework","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4366-request-smuggling-vulnerability-in-pingora-s-proxying-framework\/","title":{"rendered":"<strong>CVE-2025-4366: Request Smuggling Vulnerability in Pingora\u2019s Proxying Framework<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures (CVE) system has identified a critical vulnerability, designated as CVE-2025-4366, within Pingora\u2019s proxying framework, pingora-proxy. This vulnerability has a significant impact on the security of any system using the affected software, as it could lead to unauthorized request execution and potential cache poisoning. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32289-high-severity-php-remote-file-inclusion-vulnerability-in-apustheme-yozi\/\"  data-wpil-monitor-id=\"56061\">severity of this vulnerability<\/a>, combined with the widespread use of Pingora\u2019s proxying framework, makes it a critical issue for the cybersecurity community. It is crucial for organizations using Pingora\u2019s proxying framework to understand and mitigate this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39503-deserialization-of-untrusted-data-vulnerability-in-goodlayers-hotel\/\"  data-wpil-monitor-id=\"54478\">vulnerability to protect their systems and data<\/a> from potential attacks.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4366<br \/>\nSeverity: High (CVSS: 8.0)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41651-critical-system-compromise-due-to-missing-authentication\/\"  data-wpil-monitor-id=\"56062\">System compromise<\/a>, Data leakage, Unauthorized request execution, Cache poisoning<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-55923404\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Pingora\u2019s Proxying Framework | All versions before the patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"77067\">exploit works via a request smuggling attack<\/a>. An attacker manipulates the HTTP request bodies on cache HITs, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46458-critical-cross-site-request-forgery-csrf-vulnerability-leading-to-sql-injection-in-occupancyplan\/\"  data-wpil-monitor-id=\"55450\">injecting malicious HTTP requests<\/a> into the communication between the client and the server. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21480-memory-corruption-vulnerability-in-gpu-micronode-leads-to-unauthorized-command-execution\/\"  data-wpil-monitor-id=\"58498\">leads to unauthorized<\/a> request execution. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47277-critical-vulnerability-in-vllm-s-pyncclpipe-kv-cache-transfer-integration\/\"  data-wpil-monitor-id=\"54481\">vulnerability also opens the door for potential cache<\/a> poisoning. In an environment where Pingora\u2019s proxying framework is used for caching, an attacker can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48865-manipulation-of-x-forwarded-headers-in-fabio-prior-to-version-1-6-6\/\"  data-wpil-monitor-id=\"58302\">manipulate headers<\/a> and URLs in subsequent requests made on the same HTTP\/1.1 connection.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-220646916\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>Here is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45997-exploiting-file-upload-vulnerability-in-web-based-pharmacy-product-management-system\/\"  data-wpil-monitor-id=\"58304\">vulnerability might be exploited<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/target\/endpoint HTTP\/1.1\nHost: vulnerable.example.com\nContent-Length: 100\nContent-Type: text\/plain\nTransfer-Encoding: chunked\n0\nGET \/internal\/admin HTTP\/1.1\nHost: vulnerable.example.com\nX-Ignore: X<\/code><\/pre>\n<p>In this example, the attacker is manipulating the &#8216;Content-Length&#8217; and &#8216;Transfer-Encoding&#8217; headers to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-9408-server-side-request-forgery-attack-in-eclipse-glassfish\/\"  data-wpil-monitor-id=\"77239\">smuggle<\/a> a malicious request (GET \/internal\/admin) within the body of an initial benign request. The server interprets this as two separate requests and executes the malicious request, leading to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39350-unauthorized-access-vulnerability-in-rocket-apps-wproject\/\"  data-wpil-monitor-id=\"55644\">unauthorized access<\/a>.<\/p>\n<p><strong>Mitigation Measures<\/strong><\/p>\n<p>A patch for this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23394-critical-unix-symbolic-link-following-vulnerability-in-opensuse-tumbleweed-cyrus-imapd\/\"  data-wpil-monitor-id=\"54479\">vulnerability is available and can be accessed via the following<\/a> GitHub commit: https:\/\/github.com\/cloudflare\/pingora\/commit\/fda3317ec822678564d641e7cf1c9b77ee3759ff. All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6454-authenticated-user-exploit-in-gitlab-ce-ee-through-proxy-environments\/\"  data-wpil-monitor-id=\"90726\">users of Pingora\u2019s proxying<\/a> framework are strongly recommended to apply this patch immediately.<br \/>\nAs a temporary mitigation measure, users can also use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to monitor and block <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3090-unauthenticated-remote-attack-leading-to-potential-data-leakage-and-system-compromise\/\"  data-wpil-monitor-id=\"77066\">potential request smuggling attacks<\/a>. However, these measures cannot completely eliminate the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20217-denial-of-service-vulnerability-in-snort-3-detection-engine-of-cisco-secure-firewall-threat-defense-software\/\"  data-wpil-monitor-id=\"77065\">threat and are not a substitute for patching the vulnerability<\/a>.<br \/>\nIt is essential for organizations to enforce a robust cybersecurity policy, including regular software updates and vulnerability assessments, to ensure the security of their <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-45565-memory-corruption-vulnerability-leading-to-potential-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"58303\">systems and data<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures (CVE) system has identified a critical vulnerability, designated as CVE-2025-4366, within Pingora\u2019s proxying framework, pingora-proxy. This vulnerability has a significant impact on the security of any system using the affected software, as it could lead to unauthorized request execution and potential cache poisoning. The severity of this vulnerability, combined [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[79],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-48590","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-github"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/48590","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=48590"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/48590\/revisions"}],"predecessor-version":[{"id":83671,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/48590\/revisions\/83671"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=48590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=48590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=48590"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=48590"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=48590"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=48590"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=48590"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=48590"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=48590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}