What is CVE-2026-44697?

CVE-2026-44697 is a high-severity vulnerability in Klever-Io Klever-Go, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 8.6/10. Published 2026-05-29.

How severe is CVE-2026-44697?

High severity. CVSS v3 base score is 8.6 out of 10.

Resource exhaustion in Klever-Io Klever-Go

CVE-2026-44697

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.

EPSS: 0.004 (31.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Klever-io Klever-go — versions < 1.7.16, < 1.7.17

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44697?: CVE-2026-44697 is a high-severity vulnerability in Klever-Io Klever-Go, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 8.6/10. Published 2026-05-29.
How severe is CVE-2026-44697?: High severity. CVSS v3 base score is 8.6 out of 10.