CVE-2026-26314: Github.com/ethereum/go ethereum Denial of Service Vulnerability
HIGHCVE-2026-26314 is a HIGH denial of service vulnerability (CWE-20: Improper Input Validation) affecting Github.com/ethereum/go ethereum libraries in the Go ecosystem. The issue involves go ethereum affected by dos via malicious p2p message. Remediation is available by upgrading affected packages to version 1.16.9.
CVE-2026-26314 at a Glance
How to Fix CVE-2026-26314
To remediate this vulnerability, upgrade all affected Github.com/ethereum/go ethereum dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/ethereum/go-ethereum to 1.16.9Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/ethereum/go-ethereumHow to Check if You Are Affected
To determine whether your application is affected by CVE-2026-26314, inspect your project dependencies for Github.com/ethereum/go ethereum:
inspect dependencies for github.com/ethereum/go-ethereumAnalyze the terminal output to locate any version of Github.com/ethereum/go ethereum in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.16.9), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Github.com/ethereum/go ethereum, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-26314 Affected Github.com/ethereum/go ethereum Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/ethereum/go-ethereum
|
Go |
< 1.16.9
|
1.16.9
|
References
Frequently Asked Questions
What is CVE-2026-26314?
Which Github.com/ethereum/go ethereum versions are affected?
What version fixes CVE-2026-26314?
Is github.com/ethereum/go-ethereum affected?
What CWE is associated with CVE-2026-26314?
How can I check Go dependencies for CVE-2026-26314?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-2gjw-fg97-vg3r",
"modified" : "2026-02-27T20:38:57Z",
"published" : "2026-02-18T22:35:15Z",
"aliases" : [ "CVE-2026-26314" ],
"summary" : "Go Ethereum affected by DoS via malicious p2p message",
"details" : "### Impact\n\nA vulnerable node can be forced to shutdown/crash using a specially crafted message.\nMore details to be released later.\n\n### Patches\n\nThe problem is resolved in the v1.16.9 and v1.17.0 releases of Geth.\n\n### Credit\n\nThis issue was reported to the Ethereum Foundation Bug Bounty Program by Waleed Ahmed from vulsight.com",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/ethereum/go-ethereum"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.16.9"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 1.16.8"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/ethereum/go-ethereum/security/advisories/GHSA-2gjw-fg97-vg3r"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-26314"
}, {
"type" : "WEB",
"url" : "https://github.com/ethereum/go-ethereum/commit/895a8597cb16c02203e38707ed2d1da5c500fe60"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/ethereum/go-ethereum"
}, {
"type" : "WEB",
"url" : "https://github.com/ethereum/go-ethereum/releases/tag/v1.16.9"
}, {
"type" : "WEB",
"url" : "https://pkg.go.dev/vuln/GO-2026-4507"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-20" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-02-18T22:35:15Z",
"nvd_published_at" : "2026-02-19T22:16:46Z"
}
}