TI-2021-18677 Aliases CVE-2021-42219 GHSA-vrcc-g6vj-mh5w

Go-Ethereum v1.10.9 was discovered to contain an issue which allows attackers to cause a…

LOW 35CWE-400Published 2022-03-16 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

Go-Ethereum v1.10.9 was discovered to contain an issue which allows attackers to cause a denial of service (DoS) via sending an excessive amount of messages to a node. This is caused by missing memory in the component /ethash/algorithm.go.

Why it matters now

EPSS 0.01197 68th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA
—	github.com/ethereum/go-ethereum (Go)	up to 1.10.9	—	No fix listed	GHSA-vrcc-g6vj-mh5w

— Vendor— Affected all versions Fixed in — No fix listed CNA
github.com/ethereum/go-ethereum (Go) Vendor— Affected up to 1.10.9 Fixed in — No fix listed GHSA-vrcc-g6vj-mh5w

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ethereum:go_ethereum:1.10.9:::::::*	1.10.9	Vulnerable	ethereum

cpe:2.3:a:ethereum:go_ethereum:1.10.9:*:*:*:*:*:*:* Versions 1.10.9 Vulnerable ·ethereum

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-42219
2026-10-03 Alias added: GHSA-vrcc-g6vj-mh5w

References

Exploit 1

https://docs.google.com/document/d/1dYFSpNZPC0OV-n1mMqdc269u9yYU1XQy/edit?usp=sharing&ouid=112110745137218798745&rtpof=true&sd=true

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2021-42219

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