CVE-2026-46597

Summary

golang.org/x/crypto/ssh: Invoking byte arithmetic causes underflow and panic

Severity

high

CVSS

7.5

EPSS

0.5% (p39)

CWE

CWE-704

Also known as

GHSA-q4h4-gmj2-qvw2, GO-2026-5013

Published

2026-06-25

Updated

2026-06-25

Advisory details

An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.

References

• https://github.com/advisories/GHSA-q4h4-gmj2-qvw2
• https://nvd.nist.gov/vuln/detail/CVE-2026-46597
• https://go.dev/cl/781620
• https://go.dev/issue/79561
• https://groups.google.com/g/golang-announce/c/a082jnz-LvI
• https://pkg.go.dev/vuln/GO-2026-5013

Related advisories

• CVE-2026-46595 — critical · Go/golang.org/x/crypto/ssh
• CVE-2026-39834 — critical · Go/golang.org/x/crypto/ssh
• CVE-2026-39831 — critical · Go/golang.org/x/crypto/ssh
• CVE-2026-39830 — critical · Go/golang.org/x/crypto/ssh
• CVE-2026-39829 — high · Go/golang.org/x/crypto/ssh
• CVE-2026-39827 — medium · Go/golang.org/x/crypto/ssh
• CVE-2026-39835 — medium · Go/golang.org/x/crypto/ssh
• CVE-2026-39828 — medium · Go/golang.org/x/crypto/ssh

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