CVE-2026-62370 KubeEdge: Unbounded allocation in viaduct packer enables authenticated remote DoS against CloudHub
An authenticated attacker can cause CloudHub memory exhaustion and service disruption by sending crafted viaduct headers with excessive payload lengths.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-62370?
CVE-2026-62370 is a medium-severity denial of service vulnerability in kubeedge, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
KubeEdge is an open source system for extending native containerized application orchestration capabilities to hosts at Edge. From 1.0.0 until 1.21.2, 1.22.2, and 1.23.1, Reader.Read in pkg/viaduct/pkg/packer trusts the 32-bit PackageHeader.PayloadLen received through the CloudHub viaduct message-processing path and allocates that amount of memory before validating an upper bound. An authenticated malicious or compromised edge peer can repeatedly send crafted headers with excessive declared lengths, causing memory exhaustion, CloudHub process termination or restart loops, and temporary disruption of cloud-edge communication. This issue does not provide unauthenticated access or direct code execution. This issue is fixed in versions 1.21.2, 1.22.2, and 1.23.1.
Weakness: CWE-789
Which versions are affected by CVE-2026-62370?
7 open source packages ship an affected version, including github.com/kubeedge/kubeedge.
| Package | Affected | Fixed in |
|---|---|---|
github.com/kubeedge/kubeedge Go | From 1.0.0 | 1.21.2, 1.22.2, 1.23.1 |
github.com/kubeedge/kubeedge Go | From 1.0.0 | 1.21.2 |
github.com/kubeedge/kubeedge Go | From 1.0.0 | 1.21.2 |
github.com/kubeedge/kubeedge Go | From 1.22.0 | 1.22.2 |
github.com/kubeedge/kubeedge Go | From 1.22.0 | 1.22.2 |
github.com/kubeedge/kubeedge Go | From 1.23.0 | 1.23.1 |
1 more packages
github.com/kubeedge/kubeedge Go | From 1.23.0 | 1.23.1 |
How do I fix CVE-2026-62370?
Upgrade github.com/kubeedge/kubeedge to a fixed version for your release line: 1.21.2, 1.22.2 or 1.23.1.
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-2026-62370 being exploited?
There is no known exploitation of CVE-2026-62370 in the wild and no public exploit code.
Sources
Also known as GHSA-gfw4-49f9-cp25, GO-2026-6569.