CVE-2026-44697

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

State: Published
Severity: 8.6 High
Published: May 29, 2026
Updated: Jul 21, 2026
Reserved: May 7, 2026

Description

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.

Scores

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

Weaknesses

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

Affected Products

Product	Versions
klever-goklever-io	< 1.7.17Affected

References

https://github.com/klever-io/klever-go/security/advisories/GHSA-87m7-qffr-542v

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