How severe is CVE-2026-26315?

CVE-2026-26315 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-26315 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26315?

CVE-2026-26315 affects Ethereum Go Ethereum. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26315?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-26315 have an EU (EUVD) identifier?

Yes. CVE-2026-26315 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8436.

When was CVE-2026-26315 published?

CVE-2026-26315 was published on 2026-02-19 and last updated on 2026-06-17.

CVE-2026-26315

CVE-2026-26315 is a high-severity vulnerability in Ethereum Go Ethereum with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.9
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8436
Weakness: CWE-203
Affected product: Ethereum Go Ethereum
Published: 2026-02-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-26315?: 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.
How severe is CVE-2026-26315?: CVE-2026-26315 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-26315 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26315?: CVE-2026-26315 affects Ethereum Go Ethereum. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26315?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-26315 have an EU (EUVD) identifier?: Yes. CVE-2026-26315 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8436.
When was CVE-2026-26315 published?: CVE-2026-26315 was published on 2026-02-19 and last updated on 2026-06-17.

References

https://github.com/ethereum/go-ethereum/security/advisories/GHSA-m6j8-rg6r-7mv8

Affected products (1)

cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*

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