{"id":52307,"date":"2026-05-07T23:32:55","date_gmt":"2026-05-07T23:32:55","guid":{"rendered":"https:\/\/zero.redgem.net\/?p=52307"},"modified":"2026-05-07T23:32:55","modified_gmt":"2026-05-07T23:32:55","slug":"litellm-server-side-template-injection-in-promptstest-endpoint","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=52307","title":{"rendered":"LiteLLM: Server-Side Template Injection in \/prompts\/test endpoint_CVE-2026-42203"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.80.5 to before version 1.83.7, the POST \/prompts\/test endpoint accepted user-supplied prompt templates and rendered them without sandboxing. A crafted template could run arbitrary code inside the LiteLLM Proxy process. The endpoint only checks that the caller presents a valid proxy API key, so any authenticated user could reach it. Depending on how the proxy is deployed, this could expose secrets in the process environment (such as provider API keys or database credentials) and allow commands to be run on the host. This issue has been patched in version 1.83.7.&#8221;,&#8221;published&#8221;:&#8221;2026-05-08T03:36:58.648Z&#8221;,&#8221;modified&#8221;:&#8221;2026-05-08T03:36:58.648Z&#8221;,&#8221;type&#8221;:&#8221;cve&#8221;,&#8221;title&#8221;:&#8221;LiteLLM: Server-Side Template Injection in \/prompts\/test endpoint&#8221;,&#8221;source&#8221;:&#8221;GitHub_M&#8221;,&#8221;references&#8221;:&#8221;https:\/\/github.com\/BerriAI\/litellm\/security\/advisories\/GHSA-xqmj-j6mv-4862\\nhttps:\/\/github.com\/BerriAI\/litellm\/releases\/tag\/v1.83.7-stable&#8221;,&#8221;id&#8221;:&#8221;CVE-2026-42203&#8243;,&#8221;bulletinFamily&#8221;:&#8221;&#8221;,&#8221;cwe&#8221;:[&#8220;CWE-1336&#8243;],&#8221;cvelist&#8221;:null,&#8221;sourceData&#8221;:&#8221;BerriAI litellm \\u003e= 1.80.5, \\u003c 1.83.7&#8243;,&#8221;sourceHref&#8221;:&#8221;&#8221;,&#8221;cvss&#8221;:{&#8220;score&#8221;:8.6,&#8221;severity&#8221;:&#8221;HIGH&#8221;,&#8221;vector&#8221;:&#8221;CVSS:4.0\/AV:N\/AC:L\/AT:N\/PR:L\/UI:N\/VC:H\/VI:H\/VA:N\/SC:N\/SI:N\/SA:N&#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;litellm&#8221;,&#8221;version&#8221;:&#8221;\\u003e= 1.80.5, \\u003c 1.83.7&#8243;,&#8221;vendor&#8221;:&#8221;BerriAI&#8221;,&#8221;ai_description&#8221;:&#8221;Server-Side Template Injection vulnerability in LiteLLM&#8217;s \/prompts\/test endpoint, allowing arbitrary code execution and potential exposure of secrets.&#8221;,&#8221;ai_severity&#8221;:&#8221;High&#8221;,&#8221;ai_vendor&#8221;:&#8221;BerriAI&#8221;,&#8221;ai_product&#8221;:&#8221;LiteLLM&#8221;,&#8221;ai_version&#8221;:&#8221;1.80.5 to 1.83.7&#8243;,&#8221;ai_score&#8221;:8.6}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.80.5 to before version 1.83.7, the POST&#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":[6,8,81,12,15,13,7,11,5],"class_list":["post-52307","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-86","tag-exploit","tag-high","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>LiteLLM: Server-Side Template Injection in \/prompts\/test endpoint_CVE-2026-42203 - 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=52307\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LiteLLM: Server-Side Template Injection in \/prompts\/test endpoint_CVE-2026-42203 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. 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