Is this vulnerability remotely exploitable?

Yes. Because it stems from processing specially crafted network messages, a remote peer that can communicate with the node may be able to trigger the crash.

Does an attacker need authenticated or local access?

Typically no. An attacker usually only needs the ability to connect to the target geth node as a peer or send protocol-level traffic that reaches the message handling logic.

What is the safest general fix pattern?

The safest pattern is to enforce strict validation on all incoming protocol messages and ensure that any invalid or unexpected input is handled gracefully—rejecting the message or disconnecting the peer rather than crashing the process.

Severity:

HIGH RISK

(7.5)

Improper Input Validation (CWE-20) Leading to Node Crash in go-ethereum (geth)

CVE-2026-26314

Published:

Feb 19, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Improper Input Validation

CWE:

CWE-20

Impact:

Remote Denial of Service

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Input Validation

CWE:

CWE-20

Impact:

Remote Denial of Service

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Improper Input Validation (CWE-20) Leading to Node Crash in go-ethereum (geth)

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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