← CVE Intelligence

CVE-2026-73555

vLLM: Unauthenticated Internal Path and Username Disclosure via Validation Error Messages PUBLISHED

Description (CNA)

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. This issue is fixed in version 0.26.0.

Affected (CNA)

Vendor / productVersions
vllm-project / vllmaffected < 0.26.0

CWE

CWE-209

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.