CVE-2026-44697 PUBLISHED

Klever-Go MultiDataInterceptor: remote OOM via crafted compressed P2P payload

Assigner: GitHub_M
Reserved: 07.05.2026 Published: 29.05.2026 Updated: 29.05.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS Score: 8.6

Product Status

Vendor klever-io
Product klever-go
Versions
  • Version < 1.7.16 is affected

References

Problem Types

  • CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) CWE
  • CWE-770: Allocation of Resources Without Limits or Throttling CWE