CVE-2026-41642CWE-476

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

High · published May 7, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
48.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00605 · 48.3th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-05-07T11:50Z
EPSS history
Timeline
  • 07 MAY 11:50Z
    GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute
    cvelistv5