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CVE-2026-73555 Details

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. This issue is fixed in version 0.26.0.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/vllm-project/vllm/commit/e87521626febe2763f997691d1599de4175f4324	[email protected]
https://github.com/vllm-project/vllm/pull/46415	[email protected]
https://github.com/vllm-project/vllm/releases/tag/v0.26.0	[email protected]
https://github.com/vllm-project/vllm/security/advisories/GHSA-hwrm-c4cx-rf4j	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-209	Generation of Error Message Containing Sensitive Information	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Aug 14, 2026	CVE Modified	CISA-ADP
Aug 13, 2026	New CVE Received	[email protected]