CVE-2026-41642 HIGH

CVE-2026-41642: GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute

Vendor Osrg
Product gobgp
Weakness CWE-476
Published May 7, 2026
Last update May 7, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP due to a nil pointer dereference. When a malformed BGP UPDATE message contains an unrecognized Path Attribute marked as "Well-known," the daemon fails to interrupt the message handling flow. This results in an illegal memory access and a full process crash (panic). This issue has been patched in version 4.4.0.

Key dates

02Disclosure timeline

May 7, 2026 CVE published
May 7, 2026 Record updated