github · BazookaMusic · Apr 30, 2026 · May 4, 2026 · May 12, 2026 · May 12, 2026
@@ -41,6 +41,7 @@ ql/javascript/ql/src/Security/CWE-116/IncompleteMultiCharacterSanitization.ql
 ql/javascript/ql/src/Security/CWE-116/IncompleteSanitization.ql
 ql/javascript/ql/src/Security/CWE-116/UnsafeHtmlExpansion.ql
 ql/javascript/ql/src/Security/CWE-134/TaintedFormatString.ql
+ql/javascript/ql/src/Security/CWE-1427/SystemPromptInjection.ql
 ql/javascript/ql/src/Security/CWE-178/CaseSensitiveMiddlewarePath.ql
 ql/javascript/ql/src/Security/CWE-200/PrivateFileExposure.ql
 ql/javascript/ql/src/Security/CWE-201/PostMessageStar.ql

@@ -132,6 +132,7 @@ ql/javascript/ql/src/Security/CWE-116/UnsafeHtmlExpansion.ql
 ql/javascript/ql/src/Security/CWE-117/LogInjection.ql
 ql/javascript/ql/src/Security/CWE-1275/SameSiteNoneCookie.ql
 ql/javascript/ql/src/Security/CWE-134/TaintedFormatString.ql
+ql/javascript/ql/src/Security/CWE-1427/SystemPromptInjection.ql
 ql/javascript/ql/src/Security/CWE-178/CaseSensitiveMiddlewarePath.ql
 ql/javascript/ql/src/Security/CWE-200/FileAccessToHttp.ql
 ql/javascript/ql/src/Security/CWE-200/PrivateFileExposure.ql

@@ -47,6 +47,7 @@ ql/javascript/ql/src/Security/CWE-116/UnsafeHtmlExpansion.ql
 ql/javascript/ql/src/Security/CWE-117/LogInjection.ql
 ql/javascript/ql/src/Security/CWE-1275/SameSiteNoneCookie.ql
 ql/javascript/ql/src/Security/CWE-134/TaintedFormatString.ql
+ql/javascript/ql/src/Security/CWE-1427/SystemPromptInjection.ql
 ql/javascript/ql/src/Security/CWE-178/CaseSensitiveMiddlewarePath.ql
 ql/javascript/ql/src/Security/CWE-200/FileAccessToHttp.ql
 ql/javascript/ql/src/Security/CWE-200/PrivateFileExposure.ql

@@ -57,6 +57,7 @@ ql/javascript/ql/src/definitions.ql
 ql/javascript/ql/src/experimental/Security/CWE-094-dataURL/CodeInjection.ql
 ql/javascript/ql/src/experimental/Security/CWE-099/EnvValueAndKeyInjection.ql
 ql/javascript/ql/src/experimental/Security/CWE-099/EnvValueInjection.ql
+ql/javascript/ql/src/experimental/Security/CWE-1427/UserPromptInjection.ql
 ql/javascript/ql/src/experimental/Security/CWE-340/TokenBuiltFromUUID.ql
 ql/javascript/ql/src/experimental/Security/CWE-347/decodeJwtWithoutVerification.ql
 ql/javascript/ql/src/experimental/Security/CWE-347/decodeJwtWithoutVerificationLocalSource.ql

@@ -0,0 +1,17 @@
+extensions:
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: typeModel
+    data:
+      - ["anthropic.Client", "@anthropic-ai/sdk", "Instance"]
+
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: sinkModel
+    data:
+      - ["anthropic.Client", "Member[messages].Member[create].Argument[0].Member[system]", "system-prompt-injection"]
+      - ["anthropic.Client", "Member[messages].Member[create].Argument[0].Member[system].ArrayElement.Member[text]", "system-prompt-injection"]
+      - ["anthropic.Client", "Member[beta].Member[messages].Member[create].Argument[0].Member[system]", "system-prompt-injection"]
+      - ["anthropic.Client", "Member[beta].Member[messages].Member[create].Argument[0].Member[system].ArrayElement.Member[text]", "system-prompt-injection"]
+      - ["anthropic.Client", "Member[beta].Member[agents].Member[create].Argument[0].Member[system]", "system-prompt-injection"]
+      - ["anthropic.Client", "Member[beta].Member[agents].Member[update].Argument[1].Member[system]", "system-prompt-injection"]
@@ -0,0 +1,22 @@
+extensions:
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: typeModel
+    data:
+      - ["google-genai.Client", "@google/genai", "Member[GoogleGenAI].Instance"]
+
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: sinkModel
+    data:
+      - ["google-genai.Client", "Member[models].Member[generateContent,generateContentStream].Argument[0].Member[config].Member[systemInstruction]", "system-prompt-injection"]
+      - ["google-genai.Client", "Member[chats].Member[create].Argument[0].Member[config].Member[systemInstruction]", "system-prompt-injection"]
+      - ["google-genai.Client", "Member[chats].Member[create].ReturnValue.Member[sendMessage].Argument[0].Member[config].Member[systemInstruction]", "system-prompt-injection"]
+      - ["google-genai.Client", "Member[live].Member[connect].Argument[0].Member[config].Member[systemInstruction]", "system-prompt-injection"]
+      - ["google-genai.Client", "Member[models].Member[generateContent,generateContentStream].Argument[0].Member[contents]", "user-prompt-injection"]
+      - ["google-genai.Client", "Member[models].Member[generateImages].Argument[0].Member[prompt]", "user-prompt-injection"]
+      - ["google-genai.Client", "Member[models].Member[editImage].Argument[0].Member[prompt]", "user-prompt-injection"]
+      - ["google-genai.Client", "Member[models].Member[generateVideos].Argument[0].Member[prompt]", "user-prompt-injection"]
+      - ["google-genai.Client", "Member[chats].Member[create].ReturnValue.Member[sendMessage,sendMessageStream].Argument[0].Member[message]", "user-prompt-injection"]
+      - ["google-genai.Client", "Member[chats].Member[create].ReturnValue.Member[sendMessage,sendMessageStream].Argument[0].Member[content]", "user-prompt-injection"]
+      - ["google-genai.Client", "Member[interactions].Member[create].Argument[0].Member[input]", "user-prompt-injection"]
@@ -0,0 +1,48 @@
+extensions:
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: typeModel
+    data:
+      - ["langchain.ChatModel", "@langchain/openai", "Member[ChatOpenAI].Instance"]
+      - ["langchain.ChatModel", "@langchain/anthropic", "Member[ChatAnthropic].Instance"]
+      - ["langchain.ChatModel", "@langchain/google-genai", "Member[ChatGoogleGenerativeAI].Instance"]
+      - ["langchain.ChatModel", "@langchain/mistralai", "Member[ChatMistralAI].Instance"]
+      - ["langchain.ChatModel", "@langchain/groq", "Member[ChatGroq].Instance"]
+      - ["langchain.ChatModel", "@langchain/cohere", "Member[ChatCohere].Instance"]
+      - ["langchain.ChatModel", "@langchain/community/chat_models/fireworks", "Member[ChatFireworks].Instance"]
+      - ["langchain.ChatModel", "@langchain/ollama", "Member[ChatOllama].Instance"]
+      - ["langchain.ChatModel", "@langchain/aws", "Member[BedrockChat,ChatBedrockConverse].Instance"]
+      - ["langchain.ChatModel", "@langchain/community/chat_models/togetherai", "Member[ChatTogetherAI].Instance"]
+      - ["langchain.ChatModel", "@langchain/xai", "Member[ChatXAI].Instance"]
+      - ["langchain.ChatModel", "@langchain/openrouter", "Member[ChatOpenRouter].Instance"]
+      - ["langchain.ChatModel", "langchain", "Member[initChatModel].ReturnValue.Awaited"]
+      - ["langchain.AgentExecutor", "langchain/agents", "Member[AgentExecutor].Instance"]
+      - ["langchain.AgentExecutor", "langchain/agents", "Member[AgentExecutor].Member[fromAgentAndTools].ReturnValue"]
+      - ["langchain.Agent", "langchain", "Member[createAgent].ReturnValue"]
+      - ["langchain.LLMChain", "langchain/chains", "Member[LLMChain].Instance"]
+
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: sinkModel
+    data:
+      - ["@langchain/core/messages", "Member[HumanMessage].Argument[0]", "user-prompt-injection"]
+      - ["@langchain/core/messages", "Member[HumanMessage].Argument[0].Member[content]", "user-prompt-injection"]
+      - ["langchain", "Member[HumanMessage].Argument[0]", "user-prompt-injection"]
+      - ["langchain", "Member[HumanMessage].Argument[0].Member[content]", "user-prompt-injection"]
+      - ["@langchain/core/messages", "Member[SystemMessage].Argument[0]", "system-prompt-injection"]
+      - ["@langchain/core/messages", "Member[SystemMessage].Argument[0].Member[content]", "system-prompt-injection"]
+      - ["langchain", "Member[SystemMessage].Argument[0]", "system-prompt-injection"]
+      - ["langchain", "Member[SystemMessage].Argument[0].Member[content]", "system-prompt-injection"]
+      - ["langchain.ChatModel", "Member[invoke].Argument[0]", "user-prompt-injection"]
+      - ["langchain.ChatModel", "Member[stream].Argument[0]", "user-prompt-injection"]
+      - ["langchain.ChatModel", "Member[call].Argument[0]", "user-prompt-injection"]
+      - ["langchain.ChatModel", "Member[predict].Argument[0]", "user-prompt-injection"]
+      - ["langchain.ChatModel", "Member[batch].Argument[0].ArrayElement", "user-prompt-injection"]
+      - ["langchain.ChatModel", "Member[generate].Argument[0].ArrayElement.ArrayElement", "user-prompt-injection"]
+      - ["langchain.AgentExecutor", "Member[invoke].Argument[0].Member[input]", "user-prompt-injection"]
+      - ["langchain.Agent", "Member[invoke].Argument[0].Member[messages].ArrayElement.Member[content]", "user-prompt-injection"]
+      - ["langchain.Agent", "Member[stream].Argument[0].Member[messages].ArrayElement.Member[content]", "user-prompt-injection"]
+      - ["langchain", "Member[createAgent].Argument[0].Member[systemPrompt]", "system-prompt-injection"]
+      - ["langchain.LLMChain", "Member[call,invoke].Argument[0].Member[input]", "user-prompt-injection"]
+      - ["@langchain/core/prompts", "Member[ChatPromptTemplate].Member[fromMessages].Argument[0].ArrayElement.ArrayElement", "user-prompt-injection"]
+      - ["@langchain/core/prompts", "Member[PromptTemplate].Instance.Member[format].Argument[0]", "user-prompt-injection"]
@@ -0,0 +1,25 @@
+extensions:
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: typeModel
+    data:
+      - ["openai.Client", "openai", "Instance"]
+      - ["openai.Client", "openai", "Member[OpenAI,AzureOpenAI].Instance"]
+      - ["openai.Client", "@openai/guardrails", "Member[GuardrailsOpenAI,GuardrailsAzureOpenAI].Member[create].ReturnValue.Awaited"]
+
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: sinkModel
+    data:
+      - ["openai.Client", "Member[responses].Member[create].Argument[0].Member[instructions]", "system-prompt-injection"]
+      - ["openai.Client", "Member[beta].Member[assistants].Member[create,update].Argument[0].Member[instructions]", "system-prompt-injection"]
+      - ["openai.Client", "Member[beta].Member[threads].Member[runs].Member[create].Argument[1].Member[instructions,additional_instructions]", "system-prompt-injection"]
+      - ["@openai/agents", "Member[Agent].Argument[0].Member[instructions,handoffDescription]", "system-prompt-injection"]
+      - ["@openai/guardrails", "Member[Agent].Argument[0].Member[instructions,handoffDescription]", "system-prompt-injection"]
+      - ["@openai/agents", "Member[Agent].Instance.Member[asTool].Argument[0].Member[toolDescription]", "system-prompt-injection"]
+      - ["@openai/guardrails", "Member[Agent].Instance.Member[asTool].Argument[0].Member[toolDescription]", "system-prompt-injection"]
+      - ["@openai/agents", "Member[tool].Argument[0].Member[description]", "system-prompt-injection"]
+      - ["@openai/guardrails", "Member[tool].Argument[0].Member[description]", "system-prompt-injection"]
+      - ["@openai/guardrails", "Member[GuardrailAgent].Member[create].Argument[2]", "system-prompt-injection"]
+      - ["@openai/agents", "Member[run].Argument[1]", "user-prompt-injection"]
+      - ["@openai/agents", "Member[Runner].Instance.Member[run].Argument[1]", "user-prompt-injection"]
@@ -0,0 +1,19 @@
+extensions:
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: typeModel
+    data:
+      - ["openrouter.Client", "@openrouter/sdk", "Instance"]
+      - ["openrouter.Client", "@openrouter/sdk", "Member[OpenRouter].Instance"]
+      - ["openrouter.Agent", "@openrouter/agent", "Member[OpenRouter].Instance"]
+
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: sinkModel
+    data:
+      - ["@openrouter/agent", "Member[callModel].Argument[0].Member[instructions]", "system-prompt-injection"]
+      - ["openrouter.Agent", "Member[callModel].Argument[0].Member[instructions]", "system-prompt-injection"]
+      - ["@openrouter/agent", "Member[tool].Argument[0].Member[description]", "system-prompt-injection"]
+      - ["openrouter.Client", "Member[embeddings].Member[create].Argument[0].Member[input]", "user-prompt-injection"]
+      - ["@openrouter/agent", "Member[callModel].Argument[0].Member[input]", "user-prompt-injection"]
+      - ["openrouter.Agent", "Member[callModel].Argument[0].Member[input]", "user-prompt-injection"]
@@ -226,3 +226,28 @@ module Cryptography {
 
   class CryptographicAlgorithm = SC::CryptographicAlgorithm;
 }
+
+/**
+ * A data-flow node that prompts an AI model.
+ *
+ * Extend this class to refine existing API models. If you want to model new APIs,
+ * extend `AIPrompt::Range` instead.
+ */
+class AIPrompt extends DataFlow::Node instanceof AIPrompt::Range {
+  /** Gets an input that is used as AI prompt. */
+  DataFlow::Node getAPrompt() { result = super.getAPrompt() }
+}
+
+/** Provides a class for modeling new AI prompting mechanisms. */
+module AIPrompt {
+  /**
+   * A data-flow node that prompts an AI model.
+   *
+   * Extend this class to model new APIs. If you want to refine existing API models,
+   * extend `AIPrompt` instead.
+   */
+  abstract class Range extends DataFlow::Node {
+    /** Gets an input that is used as AI prompt. */
+    abstract DataFlow::Node getAPrompt();
+  }
+}
@@ -0,0 +1,53 @@
+/**
+ * Provides classes modeling security-relevant aspects of the `@anthropic-ai/sdk` package.
+ * See https://github.com/anthropics/anthropic-sdk-typescript
+ *
+ * Structurally typed sinks (system, beta.agents) have been moved to
+ * Models as Data: javascript/ql/lib/ext/anthropic.model.yml
+ *
+ * This file retains only role-filtered message sinks that require inspecting
+ * a sibling `role` property, which MaD cannot express.
+ */
+
+private import javascript
+
+/** Provides classes modeling prompt-injection sources of the `@anthropic-ai/sdk` package. */
+module Anthropic {
+  /** Gets a reference to the `Anthropic` client instance. */
+  private API::Node classRef() { result = API::moduleImport("@anthropic-ai/sdk").getInstance() }
+
+  /** Gets a reference to the messages.create params (both stable and beta). */
+  private API::Node messagesCreateParams() {
+    result = classRef().getMember("messages").getMember("create").getParameter(0)
+    or
+    result = classRef().getMember("beta").getMember("messages").getMember("create").getParameter(0)
+  }
+
+  /**
+   * Gets role-filtered system/assistant message sinks.
+   * These require checking a sibling `role` property and cannot be expressed in MaD.
+   */
+  API::Node getSystemOrAssistantPromptNode() {
+    // messages: [{ role: "assistant", content: "..." }]
+    exists(API::Node msg |
+      msg = messagesCreateParams().getMember("messages").getArrayElement() and
+      msg.getMember("role").asSink().mayHaveStringValue(["system", "assistant"])
+    |
+      result = msg.getMember("content")
+    )
+  }
+
+  /**
+   * Gets role-filtered user message sinks.
+   * These require checking a sibling `role` property and cannot be expressed in MaD.
+   */
+  API::Node getUserPromptNode() {
+    // messages: [{ role: "user", content: "..." }]
+    exists(API::Node msg |
+      msg = messagesCreateParams().getMember("messages").getArrayElement() and
+      not msg.getMember("role").asSink().mayHaveStringValue(["system", "assistant"])
+    |
+      result = msg.getMember("content")
+    )
+  }
+}
@@ -0,0 +1,61 @@
+/**
+ * Provides classes modeling security-relevant aspects of the `@google/genai` package.
+ * See https://github.com/googleapis/js-genai
+ *
+ * Structurally typed sinks (systemInstruction, prompt, message, etc.) have been
+ * moved to Models as Data: javascript/ql/lib/ext/google-genai.model.yml
+ *
+ * This file retains only role-filtered content sinks that require inspecting
+ * a sibling `role` property, which MaD cannot express.
+ */
+
+private import javascript
+
+/** Provides classes modeling prompt-injection sources of the `@google/genai` package. */
+module GoogleGenAI {
+  /** Gets a reference to the `GoogleGenAI` client instance. */
+  private API::Node clientRef() {
+    result = API::moduleImport("@google/genai").getMember("GoogleGenAI").getInstance()
+  }
+
+  /**
+   * Gets role-filtered system/model message sinks.
+   * These require checking a sibling `role` property and cannot be expressed in MaD.
+   */
+  API::Node getSystemOrAssistantPromptNode() {
+    // contents: [{ role: "model", parts: [{ text: "..." }] }]
+    // Gemini uses "model" role instead of "assistant"
+    exists(API::Node msg |
+      msg =
+        clientRef()
+            .getMember("models")
+            .getMember(["generateContent", "generateContentStream"])
+            .getParameter(0)
+            .getMember("contents")
+            .getArrayElement() and
+      msg.getMember("role").asSink().mayHaveStringValue(["system", "model"])
+    |
+      result = msg.getMember("parts").getArrayElement().getMember("text")
+    )
+  }
+
+  /**
+   * Gets role-filtered user message sinks.
+   * These require checking a sibling `role` property and cannot be expressed in MaD.
+   */
+  API::Node getUserPromptNode() {
+    // contents: [{ role: "user", parts: [{ text: "..." }] }]
+    exists(API::Node msg |
+      msg =
+        clientRef()
+            .getMember("models")
+            .getMember(["generateContent", "generateContentStream"])
+            .getParameter(0)
+            .getMember("contents")
+            .getArrayElement() and
+      not msg.getMember("role").asSink().mayHaveStringValue(["system", "model"])
+    |
+      result = msg.getMember("parts").getArrayElement().getMember("text")
+    )
+  }
+}