CVE-2026-18618 Ml-metdata: bundled grpc 1.46.3 (2022) with published http/2 dos cves — directly reachable on listener
An in-cluster attacker can crash the ML Metadata pod via crafted HTTP/2 requests, disrupting pipeline runs in OpenShift AI.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18618?
CVE-2026-18618 is a high-severity denial of service vulnerability in Red Hat OpenShift AI 2.25, published on 10 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in ml-metadata. The statically-linked gRPC stack in ml-metadata is outdated, making it vulnerable to known HTTP/2 denial of service (DoS) issues. An in-cluster attacker, with network access to the MLMD pod, could exploit these vulnerabilities by sending specially crafted HTTP/2 requests. This could lead to a denial of service by crashing the MLMD pod, disrupting all pipeline runs in the affected namespace.
Weakness: CWE-770
Which versions are affected by CVE-2026-18618?
How do I fix CVE-2026-18618?
No fix has been published for CVE-2026-18618 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-18618 being exploited?
There is no known exploitation of CVE-2026-18618 in the wild and no public exploit code.
Sources
Also known as GHSA-cr6h-6g58-pq2g.