CVE-2026-41643

HIGH EPSS 39.2%
Published May 7, 20261mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published May 7, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
39.2% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-129

Affected Products 1

VendorProductVersionRange
osrggobgp* <4.3.0

References 2

  • github.com https://github.com/osrg/gobgp/releases/tag/v4.3.0
    PatchRelease Notes
  • github.com https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/osrg/gobgp/releases/tag/v4.3.0
    PatchRelease Notes