What is CVE-2026-46598?

CVE-2026-46598 is a medium-severity vulnerability in Golang Crypto, classified under Improper Validation of Array Index. CVSS score: 5.3/10. Published 2026-05-22.

How severe is CVE-2026-46598?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Golang Crypto

CVE-2026-46598

For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a panic when used.

Published 2026-05-22 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.005 (42.6th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Golang Crypto
Golang.org/x/crypto Golang.org/x/crypto/ssh/agent — versions 0

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

go.dev/issue/79596 (Issue Tracking)
go.dev/cl/781360 (Issue Tracking)
groups.google.com/g/golang-announce/c/a082jnz-LvI (Mailing List)
pkg.go.dev/vuln/GO-2026-5033 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-46598?: CVE-2026-46598 is a medium-severity vulnerability in Golang Crypto, classified under Improper Validation of Array Index. CVSS score: 5.3/10. Published 2026-05-22.
How severe is CVE-2026-46598?: Medium severity. CVSS v3 base score is 5.3 out of 10.