CVE-2026-115917: vLLM is an inference and serving engine for large language models

Q: How do I fix CVE-2026-115917?

vllm: upgrade to 0.32.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-115917 being exploited?

CVE-2026-115917 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-115917 affect?

CVE-2026-115917 affects vllm. Severity is low (CVSS 3.4). vLLM is an inference and serving engine for large language models. Prior to 0.32.0, the OpenAI-compatible server configures Starlette CORSMiddleware with allowed_origins set to a wildcard by default. A malicious web page can use a victim's

Q: How urgent is CVE-2026-115917?

Priority 16/100. No elevated risk signals yet.

Routine

LOW 3.4UPGRADE

CVE-2026-115917 is a low-severity flaw (CVSS 3.4) affecting vllm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

vLLM is an inference and serving engine for large language models. Prior to 0.32.0, the OpenAI-compatible server configures Starlette CORSMiddleware with allowed_origins set to a wildcard by default. A malicious web page can use a victim's browser to reach an unauthenticated vLLM server on localhost, an internal network, or a VPN, call endpoints including GET /v1/models and POST /v1/chat/completions, consume GPU resources, and read responses. Coo

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.4 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-942
Published	2026-10-26
Last modified	2026-10-28

Publisher (CNA): GitHub, Inc. · Vendor: vllm

Last updated 2026-10-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-26 18:17 UTCPublished CVE record published
2026-10-28 15:35 UTCUpdated Record last modified

vllm vllm UPGRADE

Affected: < 0.32.0

Fixed in: 0.32.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vllm || rpm -q vllm || vllm --version

2. UPGRADE to 0.32.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vllm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vllm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-115917?

vllm: upgrade to 0.32.0. Exact commands for each OS are on this page.

Is CVE-2026-115917 being exploited?

CVE-2026-115917 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-115917 affect?

CVE-2026-115917 affects vllm. Severity is low (CVSS 3.4). vLLM is an inference and serving engine for large language models. Prior to 0.32.0, the OpenAI-compatible server configures Starlette CORSMiddleware with allowed_origins set to a wildcard by default. A malicious web page can use a victim's

How urgent is CVE-2026-115917?

Priority 16/100. No elevated risk signals yet.

Software pages

OpenAI and LLM tools vulnerabilities

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References

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