{"id":49360,"date":"2026-04-25T15:38:12","date_gmt":"2026-04-25T15:38:12","guid":{"rendered":"http:\/\/localhost\/?p=49360"},"modified":"2026-04-25T15:38:12","modified_gmt":"2026-04-25T15:38:12","slug":"go-kratos-httpdefaultservemux-fallback-servergo-newserver-confused-deputy","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=49360","title":{"rendered":"go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy_CVE-2026-6993"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A security flaw has been discovered in go-kratos kratos up to 2.9.2. This impacts the function NewServer of the file transport\/http\/server.go of the component http.DefaultServeMux Fallback Handler. The manipulation results in unintended intermediary. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The patch is identified as 0284a5bcf92b5a7ee015300ce3051baf7ae4718d. Applying a patch is advised to resolve this issue.&#8221;,&#8221;published&#8221;:&#8221;2026-04-25T18:30:16.160Z&#8221;,&#8221;modified&#8221;:&#8221;2026-04-25T18:30:16.160Z&#8221;,&#8221;type&#8221;:&#8221;cve&#8221;,&#8221;title&#8221;:&#8221;go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy&#8221;,&#8221;source&#8221;:&#8221;VulDB&#8221;,&#8221;references&#8221;:&#8221;https:\/\/vuldb.com\/vuln\/359545\\nhttps:\/\/vuldb.com\/vuln\/359545\/cti\\nhttps:\/\/vuldb.com\/submit\/797099\\nhttps:\/\/github.com\/go-kratos\/kratos\/issues\/3810\\nhttps:\/\/github.com\/go-kratos\/kratos\/pull\/3814\\nhttps:\/\/github.com\/Yanhu007\/kratos\/commit\/0284a5bcf92b5a7ee015300ce3051baf7ae4718d\\nhttps:\/\/github.com\/go-kratos\/kratos\/&#8221;,&#8221;id&#8221;:&#8221;CVE-2026-6993&#8243;,&#8221;bulletinFamily&#8221;:&#8221;&#8221;,&#8221;cwe&#8221;:[&#8220;CWE-441&#8243;],&#8221;cvelist&#8221;:null,&#8221;sourceData&#8221;:&#8221;go-kratos kratos 2.9.0\\ngo-kratos kratos 2.9.1\\ngo-kratos kratos 2.9.2&#8243;,&#8221;sourceHref&#8221;:&#8221;&#8221;,&#8221;cvss&#8221;:{&#8220;score&#8221;:6.9,&#8221;severity&#8221;:&#8221;MEDIUM&#8221;,&#8221;vector&#8221;:&#8221;CVSS:4.0\/AV:N\/AC:L\/AT:N\/PR:N\/UI:N\/VC:L\/VI:N\/VA:N\/SC:N\/SI:N\/SA:N\/E:P&#8221;,&#8221;version&#8221;:&#8221;4.0&#8243;},&#8221;cvss2&#8243;:{},&#8221;cvss3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;,&#8221;cvssV3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;}},&#8221;href&#8221;:&#8221;&#8221;,&#8221;category_name&#8221;:&#8221;CVE&#8221;,&#8221;post_link&#8221;:&#8221;&#8221;,&#8221;product&#8221;:&#8221;kratos&#8221;,&#8221;version&#8221;:&#8221;2.9.0&#8243;,&#8221;vendor&#8221;:&#8221;go-kratos&#8221;,&#8221;ai_description&#8221;:&#8221;&#8221;,&#8221;ai_severity&#8221;:&#8221;&#8221;,&#8221;ai_vendor&#8221;:&#8221;&#8221;,&#8221;ai_product&#8221;:&#8221;&#8221;,&#8221;ai_version&#8221;:&#8221;&#8221;,&#8221;ai_score&#8221;:0}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A security flaw has been discovered in go-kratos kratos up to 2.9.2. This impacts the function NewServer of the file transport\/http\/server.go of the component http.DefaultServeMux&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,48,12,21,13,7,11,5],"class_list":["post-49360","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-69","tag-exploit","tag-medium","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy_CVE-2026-6993 - zero redgem<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zero.redgem.net\/?p=49360\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy_CVE-2026-6993 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A security flaw has been discovered in go-kratos kratos up to 2.9.2. 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