CVSS 10.0CVSS 10.0 · CRITICAL

CVE-2026-46595

Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.

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Analysis

A critical vulnerability in the Go crypto/ssh package allows attackers to bypass source-address validation in SSH server configurations. This occurs when server implementations use specific callbacks other than public keys, potentially granting unauthorized network access. Developers maintaining Go-based SSH servers should update their dependencies immediately.

Severity

Score: 10.0(CRITICAL)

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

AV: NETWORK

AC: LOW

PR: NONE

UI: NONE

S: CHANGED

C: HIGH

I: HIGH

A: LOW

Weakness (CWE): CWE-863CWE-303

EPSS

Probability of exploitation (next 30 days): 0.0044 (0.4%)

Percentile: 35.5%

EPSS: 2026-07-13

Affects

golang:crypto

Technical description

Published: 5/22/2026, 4:16:25 AM

Last modified: 7/13/2026, 1:16:42 PM

References

How to read this card

Actively exploited

KEV (Known Exploited Vulnerabilities) is CISA's catalog of CVEs confirmed as actively exploited in the real world. If a CVE is on KEV, someone is already using it in attacks.

CVSS 10.0

CVSS 10.0 — máxima severidad teórica. Explotable de forma remota, sin privilegios, con impacto total. Aún no confirmada como explotada en el mundo real, pero parchea ya.

AI-recommended

Un modelo de lenguaje revisó el CVE y consideró que afecta a software ampliamente desplegado o herramientas comunes de desarrollo. Un humano del equipo aprobó la publicación antes de que llegara aquí.

Categorías de impacto que evalúa la IA

widely_deployed_infra — kernel Linux, OpenSSL, glibc, k8s, Docker, nginx, OpenSSH.

popular_dev_tooling — Node.js, Python, Go, React, Next.js, librerías comunes de npm/pip.

common_consumer_software — Chrome, Firefox, Windows, macOS, apps móviles populares.

enterprise_saas — GitHub, GitLab, Atlassian, Salesforce, Cisco, Fortinet, Ivanti.

niche_software — CMS regionales, herramientas de hobby, librerías de poco uso.

not_relevant — firmware específico de proveedor, software descontinuado.

EPSS — EPSS (Exploit Prediction Scoring System) by FIRST.org estimates the probability that a CVE will be exploited in the next 30 days. Range is 0 to 1; very fresh CVEs typically score low until evidence accumulates.