Remote Code Execution Vulnerability in GoBGP by Open Source Vendor
CVE-2026-42285

7.5HIGH

Key Information:

Vendor

Osrg

Status
Gobgp
Vendor
CVE Published:
7 May 2026

What is CVE-2026-42285?

In the GoBGP implementation, a vulnerability exists that allows an unauthenticated remote BGP peer to send a specially crafted BGP UPDATE message, triggering a fatal crash of the GoBGP service. This occurs when the server encounters inconsistent attribute lengths and fails to manage its internal state correctly, leading to a nil pointer dereference in the AdjRib.Update function. As a result, the GoBGP process crashes, resulting in complete service unavailability. This issue has been resolved in version 4.5.0.

Affected Version(s)

gobgp = 4.4.0

References

https://github.com/osrg/gobgp/security/advisories/GHSA-p3...
x_refsource_CONFIRM
https://github.com/osrg/gobgp/releases/tag/v4.5.0
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.