CVE-2026-9540

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 35.5% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-07-23.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-05-26 10:30Z3 MO AGO

Last updated

2026-05-26 13:47Z3 MO AGO

Reserved

2026-05-26

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-404Improper Resource Shutdown or ReleaseClass
• CWE-770Allocation of Resources Without Limits or ThrottlingBase

Data version

5.2

Document digest

8c89dd924f803f97146f30f2c24414b3e492089e710e32c2214e608f71c34535

• vuldb.comVDB-365601 | vllm-project vllm OpenAI-compatible Serving Path denial of servicehttps://vuldb.com/vuln/365601vdb-entry
• vuldb.comVDB-365601 | CTI Indicators (IOB, IOC, TTP)https://vuldb.com/vuln/365601/ctisignaturepermissions-required
• vuldb.comSubmit #814645 | vllm-project vllm 0.19.0 Denial of Servicehttps://vuldb.com/submit/814645third-party-advisory
• github.comhttps://github.com/vllm-project/vllm/issues/37343exploitissue-tracking
• github.comhttps://github.com/vllm-project/vllm/pull/37594issue-trackingpatch
• ingero.iohttps://ingero.io/debugging-vllm-latency-minimax-ollama-mcp/related
• github.comhttps://github.com/vllm-project/vllm/product