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CVE-2026-26315

Go Ethereum Improperly Validates the ECIES Public Key in RLPx Handshake

Published: Feb 19, 2026Updated: Feb 23, 2026 Sources: CVE List NVD GHSACWE-203
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.4%
Top 64.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

go-ethereum (Geth) is a golang execution layer implementation of the Ethereum protocol. Prior to version 1.16.9, through a flaw in the ECIES cryptography implementation, an attacker may be able to extract bits of the p2p node key. The issue is resolved in the v1.16.9 and v1.17.0 releases of Geth. Geth maintainers recommend rotating the node key after applying the upgrade, which can be done by removing the file `<datadir>/geth/nodekey` before starting Geth.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-203

Affected Products

go ethereumethereum
Mixed
OSS Libraries / generic-library
github.com/ethereum/go-ethereumGoOSS Libraries
go-ethereumethereum
Mixed
OSS Libraries / generic-library
ethereumoss-projectOSS Librariesaka go ethereum, go-ethereum, cpp-ethereum
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Discovery
View detailed technique mapping

References

https://github.com/ethereum/go-ethereum/security/advisories/GHSA-m6j8-rg6r-7mv8
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-26315
nvd.nist.gov
https://github.com/ethereum/go-ethereum/pull/33669
github.com
and 4 more references View all →

Timeline

Published
Feb 19, 2026
Last Updated
Feb 23, 2026

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