| Package | Affected versions | Patched versions |
|---|---|---|
| llama-index | ≤ 0.12.5 | |
| llama-index-core | < 0.12.6 | 0.12.6 |
| llamaindex | = 0.12.5 |
A vulnerability in the LangChainLLM class of the run-llama/llama_index repository, version v0.12.5, allows for a Denial of Service (DoS) attack. The stream_complete method executes the llm using a thread and retrieves the result via the get_response_gen method of the StreamingGeneratorCallbackHandler class. If the thread terminates abnormally before the _llm.predict is executed, there is no exception handling for this case, leading to an infinite loop in the get_response_gen function. This can be triggered by providing an input of an incorrect type, causing the thread to terminate and the process to continue running indefinitely.
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