{"id":47953,"date":"2026-04-20T01:31:44","date_gmt":"2026-04-20T01:31:44","guid":{"rendered":"http:\/\/localhost\/?p=47953"},"modified":"2026-04-20T01:31:44","modified_gmt":"2026-04-20T01:31:44","slug":"lm-sys-fastchat-arena-side-by-side-view-addtext-control-flow","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=47953","title":{"rendered":"lm-sys fastchat Arena Side-by-Side View add_text control flow_CVE-2026-6608"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function add_text of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was fixed in commit 34eca62 for gradio_block_arena_named.py, but three other files were missed.&#8221;,&#8221;published&#8221;:&#8221;2026-04-20T05:15:12.337Z&#8221;,&#8221;modified&#8221;:&#8221;2026-04-20T05:15:12.337Z&#8221;,&#8221;type&#8221;:&#8221;cve&#8221;,&#8221;title&#8221;:&#8221;lm-sys fastchat Arena Side-by-Side View add_text control flow&#8221;,&#8221;source&#8221;:&#8221;VulDB&#8221;,&#8221;references&#8221;:&#8221;https:\/\/vuldb.com\/vuln\/358243\\nhttps:\/\/vuldb.com\/vuln\/358243\/cti\\nhttps:\/\/vuldb.com\/submit\/792228\\nhttps:\/\/github.com\/lm-sys\/FastChat\/issues\/3834\\nhttps:\/\/gist.github.com\/YLChen-007\/e45039d23e698222d887ee09735d9d36\\nhttps:\/\/github.com\/lm-sys\/FastChat\/&#8221;,&#8221;id&#8221;:&#8221;CVE-2026-6608&#8243;,&#8221;bulletinFamily&#8221;:&#8221;&#8221;,&#8221;cwe&#8221;:[&#8220;CWE-670&#8243;],&#8221;cvelist&#8221;:null,&#8221;sourceData&#8221;:&#8221;lm-sys fastchat 0.2.0\\nlm-sys fastchat 0.2.1\\nlm-sys fastchat 0.2.2\\nlm-sys fastchat 0.2.3\\nlm-sys fastchat 0.2.4\\nlm-sys fastchat 0.2.5\\nlm-sys fastchat 0.2.6\\nlm-sys fastchat 0.2.7\\nlm-sys fastchat 0.2.8\\nlm-sys fastchat 0.2.9\\nlm-sys fastchat 0.2.10\\nlm-sys fastchat 0.2.11\\nlm-sys fastchat 0.2.12\\nlm-sys fastchat 0.2.13\\nlm-sys fastchat 0.2.14\\nlm-sys fastchat 0.2.15\\nlm-sys fastchat 0.2.16\\nlm-sys fastchat 0.2.17\\nlm-sys fastchat 0.2.18\\nlm-sys fastchat 0.2.19\\nlm-sys fastchat 0.2.20\\nlm-sys fastchat 0.2.21\\nlm-sys fastchat 0.2.22\\nlm-sys fastchat 0.2.23\\nlm-sys fastchat 0.2.24\\nlm-sys fastchat 0.2.25\\nlm-sys fastchat 0.2.26\\nlm-sys fastchat 0.2.27\\nlm-sys fastchat 0.2.28\\nlm-sys fastchat 0.2.29\\nlm-sys fastchat 0.2.30\\nlm-sys fastchat 0.2.31\\nlm-sys fastchat 0.2.32\\nlm-sys fastchat 0.2.33\\nlm-sys fastchat 0.2.34\\nlm-sys fastchat 0.2.35\\nlm-sys fastchat 0.2.36&#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:N\/VI:L\/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;fastchat&#8221;,&#8221;version&#8221;:&#8221;0.2.0&#8243;,&#8221;vendor&#8221;:&#8221;lm-sys&#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 vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function add_text of the component Arena Side-by-Side View Handler. The manipulation results&#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-47953","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>lm-sys fastchat Arena Side-by-Side View add_text control flow_CVE-2026-6608 - 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=47953\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"lm-sys fastchat Arena Side-by-Side View add_text control flow_CVE-2026-6608 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A vulnerability was detected in lm-sys fastchat up to 0.2.36. 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