{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/ibm-web-server-plug-ins-for-websphere-application-server-and-websphere-liberty/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-9170"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["WebSphere Application Server","WebSphere Liberty","IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty"],"_cs_severities":["high"],"_cs_tags":["vulnerability","websphere","rce","dos"],"_cs_type":"advisory","_cs_vendors":["IBM"],"content_html":"\u003cp\u003eIBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty versions 8.5 and 9.0 are susceptible to a vulnerability that could allow for denial of service and potentially remote code execution. This flaw, identified as CVE-2026-9170, stems from improper input validation within the applications. An attacker could exploit this vulnerability by sending crafted requests to the server, leading to service disruption or the ability to execute arbitrary code. Due to the widespread use of WebSphere in enterprise environments, this vulnerability poses a significant risk.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker identifies a vulnerable WebSphere Application Server or WebSphere Liberty instance (versions 8.5 or 9.0) with accessible web server plugins.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious HTTP request containing invalid or unexpected input. This input targets specific parameters or fields known to be processed by the vulnerable plugins.\u003c/li\u003e\n\u003cli\u003eThe attacker sends the specially crafted HTTP request to the targeted WebSphere server through the web server plugin.\u003c/li\u003e\n\u003cli\u003eThe WebSphere plugin receives the request and attempts to process the malicious input without proper validation.\u003c/li\u003e\n\u003cli\u003eDue to the improper input validation (CWE-444), the server misinterprets the HTTP request, potentially leading to memory corruption, resource exhaustion, or other unexpected behavior.\u003c/li\u003e\n\u003cli\u003eThis misinterpretation results in a denial-of-service condition, rendering the server unavailable to legitimate users.\u003c/li\u003e\n\u003cli\u003eIn a more severe scenario, the improper input validation could allow the attacker to inject and execute arbitrary code on the server.\u003c/li\u003e\n\u003cli\u003eSuccessful code execution grants the attacker control over the WebSphere server, potentially allowing them to access sensitive data, compromise other systems, or establish persistence.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-9170 can lead to significant consequences. A denial-of-service attack could disrupt critical business operations relying on the affected WebSphere servers. In cases of successful remote code execution, an attacker could gain complete control of the server, leading to data breaches, system compromise, and potential lateral movement within the network. Given the reliance of many organizations on WebSphere for critical applications, the impact could be widespread and severe.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security update provided by IBM to address CVE-2026-9170 as detailed in \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\u003eImplement input validation and sanitization measures within WebSphere configurations to mitigate the risk of future improper input validation vulnerabilities based on CWE-444.\u003c/li\u003e\n\u003cli\u003eDeploy the provided Sigma rule targeting suspicious HTTP requests to the WebSphere server to identify potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eEnable web server access logging and monitor for anomalies, specifically focusing on requests with unusual characters or patterns in the URI or request body.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-26T18:21:05Z","date_published":"2026-05-26T18:21:05Z","id":"https://feed.craftedsignal.io/briefs/2026-05-websphere-rce/","summary":"IBM WebSphere Application Server and WebSphere Liberty versions 8.5 and 9.0 are vulnerable to denial of service and potential remote code execution due to improper input validation as described in CVE-2026-9170.","title":"CVE-2026-9170: IBM WebSphere Application Server and Liberty Improper Input Validation Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-05-websphere-rce/"}],"language":"en","title":"CraftedSignal Threat Feed — IBM Web Server Plug-Ins for WebSphere Application Server and WebSphere Liberty","version":"https://jsonfeed.org/version/1.1"}