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TI-2020-16086 Aliases CVE-2020-26265GHSA-xw37-57qp-9mm4

Consensus flaw during block processing

Priority LOW 26CWE-682Published · Updated

Key facts

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

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

Summary

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. In Geth from version 1.9.4 and before version 1.9.20 a consensus-vulnerability could cause a chain split, where vulnerable versions refuse to accept the canonical chain. The fix was included in the Paragade release version 1.9.20. No individual workaround patches have been made -- all users are recommended to upgrade to a newer version.

Why it matters now

EPSS 0.0092 60th percentileScored 2026-11-07
Fix Fixed go-ethereum (ethereum): 1.9.20github.com/ethereum/go-ethereum (Go): 1.9.20

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
ethereumgo-ethereum1.9.4 to before 1.9.201.9.20Patch availableCNA
—github.com/ethereum/go-ethereum (Go)1.9.4 to before 1.9.201.9.20Patch availableGHSA-xw37-57qp-9mm4
  • go-ethereum Vendorethereum Affected 1.9.4 to before 1.9.20 Fixed in 1.9.20 Patch available CNA
  • github.com/ethereum/go-ethereum (Go) Vendor— Affected 1.9.4 to before 1.9.20 Fixed in 1.9.20 Patch available GHSA-xw37-57qp-9mm4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*1.9.4 to before 1.9.20Vulnerableethereum
  • cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:* Versions 1.9.4 to before 1.9.20 Vulnerable ·ethereum

Remediation

  • Fix · CNA go-ethereum (ethereum) Fixed in 1.9.20
  • Fix · GHSA-xw37-57qp-9mm4 github.com/ethereum/go-ethereum (Go) Fixed in 1.9.20 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-26265
  2. 2026-10-03 Alias added: GHSA-xw37-57qp-9mm4

References

Advisory 3

Other 5

  • 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