---
id: CVE-2026-30405
aliases:
  - GHSA-4p9m-8gc4-rw2h
  - GO-2026-4736
title: GoBGP vulnerable to a denial of service via the NEXT_HOP path attribute
summary: GoBGP vulnerable to a denial of service via the NEXT_HOP path attribute
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: osrg
product: github.com/osrg/gobgp/v4
ecosystem: go
affected:
  - github.com/osrg/gobgp/v4 <= 4.3.0
published: '2026-03-16'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:37.236133067Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-4p9m-8gc4-rw2h'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-30405'
  - url: 'https://github.com/osrg/gobgp/issues/3305'
  - url: >-
      https://github.com/osrg/gobgp/commit/583080a7258e22cc884162e15b078771aa2c2c80
  - url: 'https://github.com/osrg/gobgp'
tags:
  - osv
  - go
epss: 0.00547
epssPercentile: 0.43372
ingestedAt: '2026-09-12T03:13:01.753Z'
---

## Overview

An issue in GoBGP gobgpd v.4.2.0 allows a remote attacker to cause a denial of service via the NEXT_HOP path attribute.

## Affected packages

- `github.com/osrg/gobgp/v4 <= 4.3.0`

## Remediation

Refer to the advisory for the patched release.