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CVE-2026-90878

MEDIUM 5.3

Published 2026-09-15 · Last modified 2026-09-15

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.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 45th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.3CVSS 4.0 · MEDIUM

  • ConfidentialityNone
  • IntegrityNone
  • AvailabilityLow

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Vllm Project

Products Vllm

Weakness (CWE)

  • CWE-400: Resource Consumption
  • CWE-404: Denial of Service

CVSS vector

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

References and research data (JSON)

Vendor product assessments

  • rhaii/vllm-cpu-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-cpu-rhel9?repository_url=registry.redhat.io/rhaii/vllm-cpu-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaii/vllm-cuda-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-cuda-rhel9?repository_url=registry.redhat.io/rhaii/vllm-cuda-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaii/vllm-gaudi-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-gaudi-rhel9?repository_url=registry.redhat.io/rhaii/vllm-gaudi-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaii/vllm-neuron-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-neuron-rhel9?repository_url=registry.redhat.io/rhaii/vllm-neuron-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaii/vllm-rocm-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-rocm-rhel9?repository_url=registry.redhat.io/rhaii/vllm-rocm-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaii/vllm-spyre-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-spyre-rhel9?repository_url=registry.redhat.io/rhaii/vllm-spyre-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaii/vllm-tpu-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-tpu-rhel9?repository_url=registry.redhat.io/rhaii/vllm-tpu-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaiis/vllm-cpu-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-cpu-rhel9?repository_url=registry.redhat.io/rhaiis/vllm-cpu-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaiis/vllm-cuda-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-cuda-rhel9?repository_url=registry.redhat.io/rhaiis/vllm-cuda-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaiis/vllm-neuron-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-neuron-rhel9?repository_url=registry.redhat.io/rhaiis/vllm-neuron-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaiis/vllm-rocm-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-rocm-rhel9?repository_url=registry.redhat.io/rhaiis/vllm-rocm-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaiis/vllm-spyre-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-spyre-rhel9?repository_url=registry.redhat.io/rhaiis/vllm-spyre-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhaiis/vllm-tpu-rhel9 as a component of Red Hat AI Inference Server · known affected

    Vendor assessment for this product only.

    pkg:oci/vllm-tpu-rhel9?repository_url=registry.redhat.io/rhaiis/vllm-tpu-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhelai3/bootc-aws-cuda-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-aws-cuda-rhel9?repository_url=registry.redhat.io/rhelai3/bootc-aws-cuda-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhelai3/bootc-azure-cuda-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-azure-cuda-rhel9?repository_url=registry.redhat.io/rhelai3/bootc-azure-cuda-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhelai3/bootc-azure-rocm-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-azure-rocm-rhel9?repository_url=registry.redhat.io/rhelai3/bootc-azure-rocm-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhelai3/bootc-cuda-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-cuda-rhel9?repository_url=registry.redhat.io/rhelai3/bootc-cuda-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhelai3/bootc-gaudi-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-gaudi-rhel9?repository_url=registry.redhat.io/rhelai3/bootc-gaudi-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhelai3/bootc-gcp-cuda-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-gcp-cuda-rhel9?repository_url=registry.redhat.io/rhelai3/bootc-gcp-cuda-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhelai3/bootc-rocm-rhel9 as a component of Red Hat Enterprise Linux AI (RHEL AI) 3 · known affected

    Vendor assessment for this product only.

    pkg:oci/bootc-rocm-rhel9?repository_url=registry.redhat.io/rhelai3/bootc-rocm-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhoai/odh-kserve-agent-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-kserve-agent-rhel9?repository_url=registry.redhat.io/rhoai/odh-kserve-agent-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhoai/odh-kserve-controller-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-kserve-controller-rhel9?repository_url=registry.redhat.io/rhoai/odh-kserve-controller-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhoai/odh-kserve-router-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-kserve-router-rhel9?repository_url=registry.redhat.io/rhoai/odh-kserve-router-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhoai/odh-kserve-storage-initializer-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-kserve-storage-initializer-rhel9?repository_url=registry.redhat.io/rhoai/odh-kserve-storage-initializer-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhoai/odh-llm-d-kv-cache-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-llm-d-kv-cache-rhel9?repository_url=registry.redhat.io/rhoai/odh-llm-d-kv-cache-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhoai/odh-th-torch-cuda-py312-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-th-torch-cuda-py312-rhel9?repository_url=registry.redhat.io/rhoai/odh-th-torch-cuda-py312-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00
  • rhoai/odh-vllm-gaudi-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-vllm-gaudi-rhel9?repository_url=registry.redhat.io/rhoai/odh-vllm-gaudi-rhel9

    • none available: Fix deferred
    Red Hat · CVE-2026-90878 · Updated 2026-09-15T04:54:30+00:00

All CVSS metrics

  • MEDIUM 5.3 v4.0 · CNA Primary
    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
  • MEDIUM 4.3 v3.1 · CNA Primary
    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
  • MEDIUM 4.3 v3.0 · CNA Primary
    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
  • MEDIUM 4 v2.0 · CNA Primary
    AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR
  • LOW 2.1 v4.0 · NVD Secondary
    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/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
  • MEDIUM 4.3 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
  • MEDIUM 4 v2.0 · NVD Secondary
    AV:N/AC:L/Au:S/C:N/I:N/A:P

References

Exploit-tagged references (not proof of a PoC)

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS