CVE-2026-90878CWE-400CWE-404denial-of-service

CVE-2026-90878

Medium · published September 15, 2026

CVSS v3.1
4.3
EPSS
1%
Percentile
44.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
5.3 · 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
EPSS
0.00533 · 44.2th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-404 · Improper Resource Shutdown or Release
Published
2026-09-15T09:16Z
References (7)
https://github.com/vllm-project/vllm/ · [email protected]https://github.com/vllm-project/vllm/issues/52025 · [email protected]https://github.com/vllm-project/vllm/pull/52163 · [email protected]https://vuldb.com/cve/CVE-2026-90878 · [email protected]https://vuldb.com/submit/927901 · [email protected]https://vuldb.com/vuln/403472 · [email protected]https://vuldb.com/vuln/403472/cti · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 04:15Z
    vllm-project vLLM Jinja Template Rendering completions resource consumption
    cvelistv5