CVE-2026-18618Network attack vector

Pod crash via unbounded HTTP/2 resource allocation

Published Aug 10, 2026 · Updated Aug 10, 2026

Resource exhaustion in Red Hat OpenShift AI's ml-metadata service allows remote attackers to crash its pod with crafted HTTP/2 requests. The port 8080 listener uses a statically linked gRPC 1.46.3 stack whose HTTP/2 processing lacks effective resource limits. Reachability requires in-cluster access through the NetworkPolicy allowlist; exploitation interrupts every pipeline run in the affected namespace.

CVSS severity7.5
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Red Hat OpenShift AI's ml-metadata service allows remote attackers to crash its pod with crafted HTTP/2 requests. The port 8080 listener uses a statically linked gRPC 1.46.3 stack whose HTTP/2 processing lacks effective resource limits. Reachability requires in-cluster access through the NetworkPolicy allowlist; exploitation interrupts every pipeline run in the affected namespace.

The record

CVE
CVE-2026-18618
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-770, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5Red Hat, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.002Service Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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