What’s Vulnerable › Vulnerabilities

CVE-2026-44697: Klever-Go MultiDataInterceptor: remote OOM via crafted compressed P2P payload

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-29 · updated 2026-07-21
• Weakness: CWE-409

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.

Affected products

• klever-io klever-go: before 1.7.17

References

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

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