{"schemaVersion":3,"id":"CVE-2026-73555","aliases":["GHSA-hwrm-c4cx-rf4j","PYSEC-2026-3937","CGA-4j5w-cwp9-gvr9","CGA-5f9m-g658-pxqg","CGA-ffrm-7789-rc7w","CGA-vcr6-g3xq-93hx","CGA-xm3v-mr84-f23g"],"status":"published","duplicateOf":null,"title":null,"description":"vLLM is an inference and serving engine for large language models. Prior to 0.26.0, the validation_exception_handler in vllm/entrypoints/openai/server_utils.py converts FastAPI RequestValidationError objects with str(exc), and sanitize_message in vllm/entrypoints/utils.py does not remove traceback-style file paths, allowing unauthenticated malformed JSON requests to /v1/chat/completions, /v1/completions, /tokenize, and /detokenize to disclose the OS username, home and virtual-environment paths, Python version, internal package structure, line numbers, and endpoint handler names. 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