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Advisory record · GHSA-26r5-4mm2-px5c

Klever-Go: Zombie-order theft: `Buy` missing `IsClaimed` guard in native marketplace

CVSS 7.1 HighEPSS 0.0043 · 37th 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-26r5-4mm2-px5c · CVE-2026-82406 · GO-2026-6584
Weakness (CWE)
CWE-841
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 are affected. The native marketplace's Buy function lacks an IsClaimed check, so a bid can be placed on an order that has already been settled early by a seller accepting a resting bid. A bidder who does so is charged, cannot claim the NFT or cancel the order, and the funds are lost; the seller-side attacker can profit from this. Upgrade to version 1.7.20, which is listed as the fixed release.

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
7.1 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0043, the 37th percentile, on 5 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.