CVE-2026-115918
mediumvLLM is an inference and serving engine for large language models.
Vendor / product: Vllm — vllm
vLLM is an inference and serving engine for large language models. From 0.16.0 until 0.32.0, the /v1/responses endpoint allows an authenticated caller to place an attacker-controlled template in chat_template_kwargs[chat_template] when no server template is configured. ChatParams.get_apply_chat_template_kwargs() preserves that value without enforcing trust_request_chat_template, so the request can bypass the intended trust policy and cause CPU or memory exhaustion through Jinja rendering. This issue is fixed in version 0.32.0.
CVSS
6.5
6.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (security-advisories@github.com)
Timeline (UTC)
Published: 2026-10-26 18:17
Modified: 2026-10-28 15:35
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-28 16:01 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
vllm / vllm ≥0.16.0 <0.32.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/vllm-project/vllm/commit/cff08b461e086523cee8bba5bd3c66d302625134
Patch / mitigation: https://github.com/vllm-project/vllm/pull/50300
Patch / mitigation: https://github.com/vllm-project/vllm/security/advisories/GHSA-x567-49g5-p4cf
References
- https://github.com/vllm-project/vllm/commit/cff08b461e086523cee8bba5bd3c66d302625134 security-advisories@github.com
- https://github.com/vllm-project/vllm/pull/50300 security-advisories@github.com
- https://github.com/vllm-project/vllm/releases/tag/v0.32.0 security-advisories@github.com
- https://github.com/vllm-project/vllm/security/advisories/GHSA-x567-49g5-p4cf security-advisories@github.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-28 16:01 UTC · record ↗