CVE-2026-42285 — HIGH (7.5)

Vulnerability Description

GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.4.0, an unauthenticated remote BGP peer can trigger a fatal panic in GoBGP by sending a specially crafted BGP UPDATE message. When the server receives a message with inconsistent attribute lengths, it improperly handles the internal state transition to a "withdraw" action, leading to a nil pointer dereference in the AdjRib.Update function. This causes the entire GoBGP process to crash, resulting in a complete loss of service availability. This issue has been patched in version 4.5.0.

CVSS Score

7.5

HIGH

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

Affected Products

Vendor	Product	Versions
Osrg	Gobgp	4.4.0

Related Weaknesses (CWE)

CWE-476

References

https://github.com/osrg/gobgp/releases/tag/v4.5.0ProductRelease Notes
https://github.com/osrg/gobgp/security/advisories/GHSA-p3w2-64xm-833jExploitVendor Advisory
https://github.com/osrg/gobgp/security/advisories/GHSA-p3w2-64xm-833jExploitVendor Advisory

FAQ

What is CVE-2026-42285?

CVE-2026-42285 is a vulnerability with a CVSS score of 7.5 (HIGH). GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.4.0, an unauthenticated remote BGP peer can trigger a fatal panic in GoBGP by sending ...

How severe is CVE-2026-42285?

CVE-2026-42285 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42285?

Check the references section above for vendor advisories and patch information. Affected products include: Osrg Gobgp.