CVE-2026-54235
CVE-2026-54235 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-1287.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- CVSS v4: 6.9
- EPSS exploit prediction: 0% (18th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-38402
- Weakness: CWE-1287
- Affected product: Vllm
- Published:
- Last modified:
Description
vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.23.1rc0, ll temperature validation gates use comparison operators (<, >), which silently evaluate to False for NaN and for positive Infinity in Python's IEEE 754 float semantics. Both values pass every guard and propagate to GPU sampling kernels, where they produce undefined behavior or CUDA errors that can crash the inference worker. This vulnerability is fixed in 0.23.1rc0.
Frequently asked questions
- What is CVE-2026-54235?
- vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.23.1rc0, ll temperature validation gates use comparison operators (<, >), which silently evaluate to False for NaN and for positive Infinity in Python's IEEE 754 float semantics. Both values pass every guard and propagate to GPU sampling kernels, where they produce undefined behavior or CUDA errors that can crash the inference worker. This vulnerability is fixed in 0.23.1rc0.
- How severe is CVE-2026-54235?
- CVE-2026-54235 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
- Is CVE-2026-54235 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-54235?
- CVE-2026-54235 affects Vllm. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-54235?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-54235 have an EU (EUVD) identifier?
- Yes. CVE-2026-54235 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38402.
- When was CVE-2026-54235 published?
- CVE-2026-54235 was published on 2026-06-22 and last updated on 2026-06-24.
References
- https://github.com/vllm-project/vllm/commit/d598d239737cfa37bcfcb98886ec3f3557fc7198
- https://github.com/vllm-project/vllm/pull/45116
- https://github.com/vllm-project/vllm/security/advisories/GHSA-7h4p-rffg-7823
Affected products (1)
- cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*
More vulnerabilities in Vllm
- CVE-2025-32444 — Critical (CVSS 10.0): vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. Versions starting from 0.6.5 and…
- CVE-2026-22778 — Critical (CVSS 9.8): vLLM is an inference and serving engine for large language models (LLMs). From 0.8.3 to before 0.14.1, when an invalid…
- CVE-2025-47277 — Critical (CVSS 9.8): vLLM, an inference and serving engine for large language models (LLMs), has an issue in versions 0.6.5 through 0.8.4…
- CVE-2024-11041 — Critical (CVSS 9.8): vllm-project vllm version v0.6.2 contains a vulnerability in the MessageQueue.dequeue() API function. The function uses…
- CVE-2026-48746 — Critical (CVSS 9.1): vLLM is an inference and serving engine for large language models (LLMs). From 0.3.0 until 0.22.0, a vulnerability in…
- CVE-2025-29783 — Critical (CVSS 9.0): vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. When vLLM is configured to use…
Other CWE-1287 vulnerabilities
- CVE-2024-51550 — Critical (CVSS 10.0): Data Validation / Data Sanitization vulnerabilities in Linux allows unvalidated and unsanitized data to be injected in…
- CVE-2024-6298 — Critical (CVSS 10.0): Unauthorized file access in WEB Server in ABB ASPECT - Enterprise v3.08.01; NEXUS Series v3.08.01 ; MATRIX Series…
- CVE-2026-44935 — Critical (CVSS 9.9): Missing validation of "valuesFrom" references in Helm Deployer of SUSE Rancher Fleet 0.15 before 0.15.2, 0.14 before…
- CVE-2024-4879 — Critical (CVSS 9.8): ServiceNow has addressed an input validation vulnerability that was identified in Vancouver and Washington DC Now…
- CVE-2021-32024 — Critical (CVSS 9.8): A remote code execution vulnerability in the BMP image codec of BlackBerry QNX SDP version(s) 6.4 to 7.1 could allow an…
- CVE-2026-24307 — Critical (CVSS 9.3): Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information…