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.
Published: 2026-05-07
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-7235-89m6-f4px GoBGP has Remote Denial of Service (Panic) via Malformed Well-known Path Attribute
History

Thu, 07 May 2026 20:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:osrg:gobgp:4.3.0:*:*:*:*:*:*:*

Thu, 07 May 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Osrg
Osrg gobgp
Vendors & Products Osrg
Osrg gobgp

Thu, 07 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 07 May 2026 12:15:00 +0000

Type Values Removed Values Added
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.
Title GoBGP: Remote Denial of Service (Panic) via Malformed Well-known Path Attribute
Weaknesses CWE-476
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-07T12:34:38.588Z

Reserved: 2026-04-21T23:58:43.801Z

Link: CVE-2026-41642

cve-icon Vulnrichment

Updated: 2026-05-07T12:32:47.501Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-07T12:16:17.460

Modified: 2026-05-07T19:46:05.597

Link: CVE-2026-41642

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-07T15:45:32Z

Weaknesses