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Advisory record · GHSA-9wh6-9hq7-9688

Klever-Go: Validator registration accepts an unvalidated BLS public key → consensus liveness DoS

CVSS 7.0 HighEPSS 0.0047 · 40th percentile

Published by the GitHub Advisory Database at 23 Sept 2026, 21:24 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/klever-io/klever-goGo<1.7.201.7.20
Identifiers
GHSA-9wh6-9hq7-9688 · CVE-2026-82407 · GO-2026-6586
Weakness (CWE)
CWE-20
Tags
Published
23 Sept 2026
Updated
1 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Klever-Go versions before 1.7.20 accept validator registration with a malformed BLS public key. Anyone who can stake the minimum validator amount can register such a key, and when that validator is selected into a consensus group, block production fails for those rounds. Upgrade to version 1.7.20.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.0 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0047, the 40th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:12 UTC First seen by agentprime
  2. 31 Oct 2026, 14:12 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.