CVE-2026-46597

Description

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

Overview

State: PUBLISHED
Assigner (CNA): Go
CVSS severity: high
CVSS score: 7.5 / 10
CVSS vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Effective score: 7.5 / 10 HIGH source: CNA overview
MSRC score: 7.5 / 10 HIGH MS rating: Important
CWE(s): CWE-191: Integer Underflow (Wrap or Wraparound)
Reserved: 2026-05-15
Published: 2026-05-22 02:31 UTC
Last updated: 2026-05-22 14:08 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/46xxx/CVE-2026-46597.json
Linked Threat: CVE-2026-46597 — CVE-2026-46597

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-22 04:16:26 UTC
NVD last modified: 2026-05-22 04:16:26 UTC
EPSS score: 0.0004 (probability of exploitation in next 30 days)
EPSS percentile: 12.73% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-31388
Assigner: Go
Published: May 22, 2026, 2:31:26 AM
Updated: May 22, 2026, 2:08:27 PM
EUVD base score (CVSS 3.1): 7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EUVD-reported EPSS: 0.0500
Vendors: golang.org/x/crypto
Products: golang.org/x/crypto/ssh (0 <0.52.0)

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

EUVD references (4)

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-07-28 03:00 UTC (source: CVRF).

MS severity: Important
MS CVSS base score: 7.5 / 10 (temporal 7.5)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Release: 2026-May

Microsoft remediations / KB articles (2)

CBL-Mariner Releases — Vendor Fix / Security Update (fixed build 1.12.15-8)
https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade — None Available / CBL-Mariner Releases

Affected products (1)

Vendor	Product	Versions	Platforms
golang.org/x/crypto	golang.org/x/crypto/ssh	`0` (affected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

Web references (9)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

None Available msrc
MSRC update guide: CVE-2026-46597 msrc
https://www.first.org/epss/ tenable:www.first.org
https://groups.google.com/g/golang-announce/c/a082jnz-LvI tenable:groups.google.com
https://go.dev/issue/79561 tenable:go.dev
https://nvd.nist.gov/vuln/detail/CVE-2026-46597 tenable:nvd.nist.gov
https://pkg.go.dev/vuln/GO-2026-5013 tenable:pkg.go.dev
https://www.cve.org/CVERecord?id=CVE-2026-46597 tenable:www.cve.org
https://go.dev/cl/781620 tenable:go.dev

NVD-tagged references (4)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://go.dev/cl/781620 security@golang.org
https://go.dev/issue/79561 security@golang.org
https://groups.google.com/g/golang-announce/c/a082jnz-LvI security@golang.org
https://pkg.go.dev/vuln/GO-2026-5013 security@golang.org

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Nvd - Cve-2026-41097

web:nvd.nist.gov

This is a potential security issue, you are being redirected to https://nvd.nist.gov

2026-05-26 03:00 UTC
CVE-2026-46597 : Server-Side Panic in AES-GCM Packet Decoder Affecting ...

web:securityvulnerability.io

What is CVE-2026-46597 ? The vulnerability arises from an improper casting mechanism in the AES-GCM packet decoder utilized by the Go programming language. This flaw can lead to a server-side panic when processing specifically crafted inputs, potentially disrupting service and impacting overall system integrity.

2026-05-26 03:00 UTC
March 13, 2026—Hotpatch KB5084597 (OS Builds 26200.7982 and 26100.7982 ...

web:support.microsoft.com

This update for Windows 11, version 25H2 and 24H2 (KB5084597) incudes security improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates. To view the ...

2026-05-26 03:00 UTC
CVE-2026-46597: Vulnerability in golang.org/x/crypto Package Leading to ...

web:vulert.com

Learn about CVE-2026-46597 , a vulnerability in the golang.org/x/crypto package that can cause server-side panic. Discover how to fix it and check your application for ...

2026-05-26 03:00 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-26 03:00 UTC
Patch Tuesday - June 2025 - Rapid7 Blog

web:www.rapid7.com

Microsoft is addressing 67 vulnerabilities this June 2025 Patch Tuesday. Learn more about the findings in this Patch Tuesday.

2026-05-26 03:00 UTC
CVE-2026-46597: Denial of Service vulnerability in crypto (Go)

web:www.resolvedsecurity.com

What is the Impact of CVE-2026-46597 ? Successful exploitation may allow attackers to cause a server-side panic and crash the affected service, leading to a denial of service for legitimate users. What is the Exploitability of CVE-2026-46597 ? Exploitation involves sending a specifically engineered AES-GCM packet to the vulnerable service.

2026-05-26 03:00 UTC
Vulnerability Remediation vs. Mitigation: What are the Differences ...

web:www.secure.com

Learn the difference between vulnerability remediation and mitigation , and how a risk-based strategy can strengthen your security posture.

2026-05-26 03:00 UTC
Vulnerability Remediation vs Mitigation: Which is Best?

web:www.strongboxit.com

Learn the key differences between vulnerability remediation vs mitigation in cybersecurity. Discover which method is effective for protecting your data.

2026-05-26 03:00 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-26 03:00 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-46597.json.

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              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
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      ],
      "title": "Invoking  byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh"
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