CVE-2026-90878
vllm-project vLLM Jinja Template Rendering completions resource consumption
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Reserved
- Sep 14, 2026
Description
A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 4.3 Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 4.0 Medium | AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
vLLMvllm-project |
|
References
- VDB-403472 | vllm-project vLLM Jinja Template Rendering completions resource consumptionvdb-entrytechnical-description
- VDB-403472 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- CVE-2026-90878 | CVE Analysis and Reportthird-party-advisory
- Submit #927901 | vLLM Project vLLM 0.27.1 Asymmetric Resource Consumptionthird-party-advisory
- https://github.com/vllm-project/vllm/issues/52025exploitissue-tracking
- https://github.com/vllm-project/vllm/pull/52163issue-trackingpatch
- https://github.com/vllm-project/vllm/product
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