CVE-2026-41643

GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP where a malformed BGP UPDATE message can trigger a runtime error: index out of range panic. This occurs during the processing of 4-byte AS attributes when the message structure causes an internal slice index shift that is not properly handled. This issue has been patched in version 4.3.0.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/osrg/gobgp/releases/tag/v4.3.0	Patch Release Notes
https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q	Exploit Vendor Advisory
https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:osrg:gobgp:*:*:*:*:*:*:*:*

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) GoBGP es una implementación de código abierto del Protocolo de Pasarela Fronteriza (BGP) en el Lenguaje de Programación Go. Antes de la versión 4.3.0, existe una vulnerabilidad remota de denegación de servicio (DoS) en GoBGP donde un mensaje BGP UPDATE malformado puede desencadenar un error en tiempo de ejecución: pánico de índice fuera de rango. Esto ocurre durante el procesamiento de atributos AS de 4 bytes cuando la estructura del mensaje causa un desplazamiento interno del índice de la slice que no se maneja correctamente. Este problema ha sido parcheado en la versión 4.3.0.

Information

Published : 2026-05-07 12:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-41643

Mitre link : CVE-2026-41643

CVE.ORG link : CVE-2026-41643

JSON object : View

Products Affected

osrg

gobgp

CWE

CWE-129

Improper Validation of Array Index

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