What’s Vulnerable › Vulnerabilities

CVE-2020-26242: Denial of service in geth

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-11-25 · updated 2026-06-17

Description

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.18, there is a Denial-of-service (crash) during block processing. This is fixed in 1.9.18.

Affected products

• ethereum go-ethereum: before 1.9.18 — fixed in 1.9.18

How to fix

Upgrade to a fixed version: ethereum go-ethereum 1.9.18. Check the vendor advisory for mitigations.

References

• https://blog.ethereum.org/2020/11/12/geth_security_release/
• https://github.com/ethereum/go-ethereum/security/advisories/GHSA-jm5c-rv3w-w83m
• https://blog.ethereum.org/2020/11/12/geth_security_release/
• https://github.com/ethereum/go-ethereum/security/advisories/GHSA-jm5c-rv3w-w83m

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