How severe is CVE-2026-54233?

CVE-2026-54233 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-2026-54233 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-54233?

CVE-2026-54233 affects Vllm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-54233?

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

Does CVE-2026-54233 have an EU (EUVD) identifier?

Yes. CVE-2026-54233 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38404.

When was CVE-2026-54233 published?

CVE-2026-54233 was published on 2026-06-22 and last updated on 2026-06-24.

CVE-2026-54233

CVE-2026-54233 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-409.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38404
Weakness: CWE-409
Affected product: Vllm
Published: 2026-06-22
Last modified: 2026-06-24

Description

vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.23.1rc0, vLLM's /v1/audio/transcriptions endpoint limits compressed upload size but not decoded PCM output. A 25MB OPUS file expands to ~14.9GB of float32 PCM at decode time. This vulnerability is fixed in 0.23.1rc0.

Frequently asked questions

What is CVE-2026-54233?: vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.23.1rc0, vLLM's /v1/audio/transcriptions endpoint limits compressed upload size but not decoded PCM output. A 25MB OPUS file expands to ~14.9GB of float32 PCM at decode time. This vulnerability is fixed in 0.23.1rc0.
How severe is CVE-2026-54233?: CVE-2026-54233 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-2026-54233 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-54233?: CVE-2026-54233 affects Vllm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-54233?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-54233 have an EU (EUVD) identifier?: Yes. CVE-2026-54233 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38404.
When was CVE-2026-54233 published?: CVE-2026-54233 was published on 2026-06-22 and last updated on 2026-06-24.

References

Affected products (1)

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

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