How severe is CVE-2025-48944?

CVE-2025-48944 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-48944 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-48944?

CVE-2025-48944 affects Vllm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-48944?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-48944 have an EU (EUVD) identifier?

Yes. CVE-2025-48944 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16353.

When was CVE-2025-48944 published?

CVE-2025-48944 was published on 2025-05-30 and last updated on 2026-06-17.

CVE-2025-48944

CVE-2025-48944 is a medium-severity vulnerability in Vllm with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-16353
Weakness: CWE-20
Affected product: Vllm
Published: 2025-05-30
Last modified: 2026-06-17

Description

vLLM is an inference and serving engine for large language models (LLMs). In version 0.8.0 up to but excluding 0.9.0, the vLLM backend used with the /v1/chat/completions OpenAPI endpoint fails to validate unexpected or malformed input in the "pattern" and "type" fields when the tools functionality is invoked. These inputs are not validated before being compiled or parsed, causing a crash of the inference worker with a single request. The worker will remain down until it is restarted. Version 0.9.0 fixes the issue.

Frequently asked questions

What is CVE-2025-48944?: vLLM is an inference and serving engine for large language models (LLMs). In version 0.8.0 up to but excluding 0.9.0, the vLLM backend used with the /v1/chat/completions OpenAPI endpoint fails to validate unexpected or malformed input in the "pattern" and "type" fields when the tools functionality is invoked. These inputs are not validated before being compiled or parsed, causing a crash of the inference worker with a single request. The worker will remain down until it is restarted. Version 0.9.0 fixes the issue.
How severe is CVE-2025-48944?: CVE-2025-48944 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-48944 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-48944?: CVE-2025-48944 affects Vllm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-48944?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-48944 have an EU (EUVD) identifier?: Yes. CVE-2025-48944 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16353.
When was CVE-2025-48944 published?: CVE-2025-48944 was published on 2025-05-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*

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