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TI-2021-16524 Aliases CVE-2021-39137GHSA-9856-9gg9-qcmq

Consensus flaw during block processing in go-ethereum

Priority LOW 36CWE-436Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

go-ethereum is the official Go implementation of the Ethereum protocol. In affected versions a consensus-vulnerability in go-ethereum (Geth) could cause a chain split, where vulnerable versions refuse to accept the canonical chain. Further details about the vulnerability will be disclosed at a later date. A patch is included in the upcoming `v1.10.8` release. No workaround are available.

Why it matters now

EPSS 0.01325 71st percentileScored 2026-11-07
Fix Fixed go-ethereum (ethereum): 1.10.8github.com/ethereum/go-ethereum (Go): 1.10.8

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ethereumgo-ethereum1.10.0 to before 1.10.81.10.8Patch availableCNA
—github.com/ethereum/go-ethereum (Go)1.10.0 to before 1.10.81.10.8Patch availableGHSA-9856-9gg9-qcmq
  • go-ethereum Vendorethereum Affected 1.10.0 to before 1.10.8 Fixed in 1.10.8 Patch available CNA
  • github.com/ethereum/go-ethereum (Go) Vendor— Affected 1.10.0 to before 1.10.8 Fixed in 1.10.8 Patch available GHSA-9856-9gg9-qcmq

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*1.10.0 to before 1.10.8Vulnerableethereum
  • cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:* Versions 1.10.0 to before 1.10.8 Vulnerable ·ethereum

Remediation

  • Fix · CNA go-ethereum (ethereum) Fixed in 1.10.8
  • Fix · GHSA-9856-9gg9-qcmq github.com/ethereum/go-ethereum (Go) Fixed in 1.10.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-39137
  2. 2026-10-03 Alias added: GHSA-9856-9gg9-qcmq

References

Advisory 3

Other 3

  • TI-2023-22561 Geth (aka go-ethereum) through 1.13.4, when --http --graphql is used, allows remote… CVSS 3.1HIGH 7.5
  • TI-2026-21270 Go Ethereum affected by DoS via malicious p2p message CVSS 4.0HIGH 8.7
  • TI-2023-21389 Denial of service via malicious p2p message in go-ethereum CVSS 3.1HIGH 7.5
  • TI-2018-08612 The GetBlockHeadersMsg handler in the LES protocol implementation in Go Ethereum (aka… CVSS 3.0HIGH 7.5
  • TI-2026-21271 Go Ethereum Improperly Validates the ECIES Public Key in RLPx Handshake CVSS 4.0MEDIUM 6.9
  • TI-2026-21269 Go Ethereum affected by DoS via malicious p2p message CVSS 4.0MEDIUM 6.9
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences