CVE-2026-41642
GoBGP has Remote Denial of Service (Panic) via Malformed Well-known Path Attribute
7.5
HIGH
CVSS 3.1
EPSS 0.06%
Description
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.
How to fix CVE-2026-41642
To remediate CVE-2026-41642, upgrade the affected package to a fixed version below.
- —upgrade to 4.4.0-1 or later
- —upgrade to 4.4.0 or later
Is CVE-2026-41642 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.4.0-1
- >= 4.3.0, < 4.4.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |