CVE-2026-44697: Klever-Io Klever-Go

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.17, a remote, unauthenticated denial-of-service vulnerability in Batch.Decompress (data/batch/batch.go) allows any peer that participates in a topic served by MultiDataInterceptor to allocate multi-gigabyte heaps on the receiving node from a sub-50 KiB gossip payload. A single packet is sufficient to OOM-kill a validator with conventional memory provisioning. Fleet-wide application affects chain liveness. This vulnerability is fixed in 1.7.17.

Affected products

• Klever-Io Klever-Go: before 1.7.17 (fixed in 1.7.17)

Published 2026-05-29. Last modified 2026-07-21.