CVE-2026-73555 vLLM: Unauthenticated Internal Path and Username Disclosure via Validation Error Messages

vLLM is an inference and serving engine for large language models. Prior to 0.26.0, the validationexceptionhandler in vllm/entrypoints/openai/serverutils.py converts FastAPI RequestValidationError objects with strexc, and sanitizemessage in vllm/entrypoints/utils.py does not remove traceback-styl...

CVE-2026-73555

CVE-2026-73555 affects vLLM prior to 0.26.0. The issue arises in the validation_exception_handler (vllm/entrypoints/openai/server_utils.py) which converts FastAPI RequestValidationError objects with str(exc), and in sanitize_message (vllm/entrypoints/utils.py) which does not remove traceback-styl...