{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-8620/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-8620"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["WebSphere Application Server","WebSphere Application Server Liberty","IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5","IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 9.0"],"_cs_severities":["medium"],"_cs_tags":["http-request-smuggling","websphere","cve-2026-8620"],"_cs_type":"threat","_cs_vendors":["IBM"],"content_html":"\u003cp\u003eIBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty versions 8.5 and 9.0, as well as IBM WebSphere Application Server and WebSphere Application Server Liberty, are susceptible to HTTP request smuggling attacks. This vulnerability, identified as CVE-2026-8620, arises from an inconsistent interpretation of HTTP requests processed by the Web Server Plug-ins. An attacker can exploit this by crafting malicious HTTP requests designed to confuse the plug-in, potentially leading to unauthorized access, information disclosure, or manipulation of subsequent requests. This vulnerability can be exploited by sending specially crafted requests.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request designed to exploit differences in how front-end and back-end servers parse HTTP headers, focusing on Content-Length and Transfer-Encoding.\u003c/li\u003e\n\u003cli\u003eThe attacker sends the crafted HTTP request to the Web Server Plug-in.\u003c/li\u003e\n\u003cli\u003eThe Web Server Plug-in forwards part of the malicious request to the back-end WebSphere server.\u003c/li\u003e\n\u003cli\u003eThe back-end WebSphere server interprets the smuggled request as a separate, legitimate request.\u003c/li\u003e\n\u003cli\u003eThe attacker potentially gains unauthorized access to resources or performs actions on behalf of other users, depending on the smuggled request.\u003c/li\u003e\n\u003cli\u003eSensitive information may be disclosed if the smuggled request targets vulnerable endpoints.\u003c/li\u003e\n\u003cli\u003eThe attacker may be able to poison the cache if a caching mechanism is in place, affecting other users.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-8620 can lead to various security implications. Attackers can potentially bypass security controls, gain unauthorized access to sensitive data, or manipulate application behavior. The severity of the impact depends on the specific configuration of the WebSphere Application Server and the nature of the smuggled requests. While specific victim counts or sector targeting aren\u0026rsquo;t available, the potential for data breaches and service disruption is significant.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security fix provided by IBM as detailed in their advisory to remediate CVE-2026-8620 (\u003ca href=\"https://www.ibm.com/support/pages/node/7274072)\"\u003ehttps://www.ibm.com/support/pages/node/7274072)\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect Suspicious HTTP Requests to WebSphere\u003c/code\u003e to identify potential exploitation attempts within web server logs.\u003c/li\u003e\n\u003cli\u003eReview and harden HTTP header parsing configurations in WebSphere Application Server to prevent request smuggling.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-26T18:19:23Z","date_published":"2026-05-26T18:19:23Z","id":"https://feed.craftedsignal.io/briefs/2026-05-websphere-http-smuggling/","summary":"IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5 and 9.0 are vulnerable to HTTP request smuggling due to inconsistent interpretation of HTTP requests, potentially leading to unauthorized access and data manipulation.","title":"CVE-2026-8620: IBM WebSphere Application Server HTTP Request Smuggling Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-05-websphere-http-smuggling/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-8620","version":"https://jsonfeed.org/version/1.1"}