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TI-2026-21270 Aliases CVE-2026-26314GHSA-2gjw-fg97-vg3r

Go Ethereum affected by DoS via malicious p2p message

Priority MEDIUM 45CWE-20Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

go-ethereum (geth) is a golang execution layer implementation of the Ethereum protocol. Prior to version 1.16.9, a vulnerable node can be forced to shutdown/crash using a specially crafted message. The problem is resolved in the v1.16.9 and v1.17.0 releases of Geth.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00659 51st percentileScored 2026-11-07
Fix Fixed go-ethereum (ethereum): 1.16.9github.com/ethereum/go-ethereum (Go): 1.16.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ethereumgo-ethereumbefore 1.16.91.16.9Patch availableCNA
—github.com/ethereum/go-ethereum (Go)before 1.16.91.16.9Patch availableGHSA-2gjw-fg97-vg3r
  • go-ethereum Vendorethereum Affected before 1.16.9 Fixed in 1.16.9 Patch available CNA
  • github.com/ethereum/go-ethereum (Go) Vendor— Affected before 1.16.9 Fixed in 1.16.9 Patch available GHSA-2gjw-fg97-vg3r

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*before 1.16.9Vulnerableethereum
  • cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:* Versions before 1.16.9 Vulnerable ·ethereum

Remediation

  • Fix · CNA go-ethereum (ethereum) Fixed in 1.16.9
  • Fix · GHSA-2gjw-fg97-vg3r github.com/ethereum/go-ethereum (Go) Fixed in 1.16.9 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26314
  2. 2026-10-03 Alias added: GHSA-2gjw-fg97-vg3r

References

Patch 1

Advisory 2

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-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
  • TI-2020-16061 Erroneous Proof of Work calculation in geth CVSS 3.1HIGH 7.5
See all 23 →

Sources

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