What is CVE-2026-26315?

CVE-2026-26315 is a high-severity vulnerability in Ethereum Go-Ethereum, classified under Observable Discrepancy. CVSS score: 7.5/10. Published 2026-02-19.

How severe is CVE-2026-26315?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Ethereum Go-Ethereum

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.

EPSS: 0.004 (36.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Ethereum Go-ethereum — versions < 1.16.9
Ethereum Go_ethereum

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-26315?: CVE-2026-26315 is a high-severity vulnerability in Ethereum Go-Ethereum, classified under Observable Discrepancy. CVSS score: 7.5/10. Published 2026-02-19.
How severe is CVE-2026-26315?: High severity. CVSS v3 base score is 7.5 out of 10.