{"id":49924,"date":"2026-04-28T10:29:31","date_gmt":"2026-04-28T10:29:31","guid":{"rendered":"http:\/\/localhost\/?p=49924"},"modified":"2026-04-28T10:29:31","modified_gmt":"2026-04-28T10:29:31","slug":"spring-grpc-authenticationexception-message-reflected-to-remote-client","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=49924","title":{"rendered":"Spring gRPC AuthenticationException message reflected to remote client_CVE-2026-40969"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;The raw message of every server-side AuthenticationException is returned to the unauthenticated remote caller in the gRPC status description. This allows an attacker to obtain information about the authentication failure, which may be useful for further attacks.\\n\\nAffected versions:\\nSpring gRPC: 1.0.0 &#8211; 1.0.2 (fixed in 1.0.3). 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This allows an attacker to obtain&#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":[6,8,145,12,71,13,7,11,5],"class_list":["post-49924","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-37","tag-exploit","tag-low","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>Spring gRPC AuthenticationException message reflected to remote client_CVE-2026-40969 - 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=49924\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spring gRPC AuthenticationException message reflected to remote client_CVE-2026-40969 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;The raw message of every server-side AuthenticationException is returned to the unauthenticated remote caller in the gRPC status description. 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