Advisory details:
pypa / vllm/PYSEC-2026-3407
| Advisory ID | pypa/vllm/PYSEC-2026-3407 |
| Aliases |
CVE-2026-9540
GHSA-98f3-hwg4-4rf7 PYSEC-2026-3407 |
| Summary | vllm has Improper Resource Shutdown or Release A vulnerability was identified in vllm-project vllm 0.19.0. This issue affects some unknown processing of the component OpenAI-compatible Serving Path. Such manipulation leads to denial of service. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The pull request to fix this issue awaits acceptance. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 5.0 |
| Risk | 2.5 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| There are no known CWE. |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 5.3 | https://github.com/pypa/advisory-database/blob/main/vulns/vllm/PYSEC-2026-3407.yaml |
| cvssv4 | 5.5 | https://github.com/pypa/advisory-database/blob/main/vulns/vllm/PYSEC-2026-3407.yaml |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/vllm-project/vllm | ||
| https://ingero.io/debugging-vllm-latency-minimax-ollama-mcp | ||
| https://pypi.org/project/vllm | ||
| 365601 | Advisory | https://vuldb.com/vuln/365601 |
| 37343 | Bug | https://github.com/vllm-project/vllm/issues/37343 |
| 37594 | Bug | https://github.com/vllm-project/vllm/pull/37594 |
| 814645 | Advisory | https://vuldb.com/submit/814645 |
| cti | Other | https://vuldb.com/vuln/365601/cti |
| CVE-2026-9540 | https://nvd.nist.gov/vuln/detail/CVE-2026-9540 | |
| GHSA-98f3-hwg4-4rf7 | https://github.com/advisories/GHSA-98f3-hwg4-4rf7 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-05-26T13:47:49Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/9xxx/CVE-2026-9540.json
Source Advisory: vulnrichment/CVE-2026-9540
[{'Exploitation': 'poc'},
{'Automatable': 'yes'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]