Is CVE-2026-42285 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-42285 being exploited in the wild.

How severe is CVE-2026-42285?

High severity, with a CVSS score of 7.5, published 7 May 2026.

Which products and versions are affected?

github.com/osrg/gobgp/v4 (Go) SEMVER:introduced=4.4.0,fixed=4.5.0.

Is there a fix for CVE-2026-42285?

Yes. github.com/osrg/gobgp/v4 (Go): upgrade to 4.5.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-42285 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-42285?

Check whether you run github.com/osrg/gobgp/v4 (Go) or Osrg Gobgp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-42285: osrg GoBGP nil pointer dereference in AdjRib.Update

CVE-2026-42285 · Severity: high · CVSS 7.5 · Published 2026-05-07

GoBGP is an open-source tool used to manage how internet traffic is routed between different networks. A vulnerability in version 4.4.0 allows an unauthenticated remote attacker to crash the GoBGP service by sending a specially crafted routing update message. This results in a complete loss of service availability, potentially disrupting network connectivity and routing operations until the service is manually restarted.

Technologies: github.com/osrg/gobgp/v4 (Go), Osrg Gobgp. Vendors: Go, Osrg.

Quick answers

Is CVE-2026-42285 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-42285 being exploited in the wild.
How severe is CVE-2026-42285?: High severity, with a CVSS score of 7.5, published 7 May 2026.
Which products and versions are affected?: github.com/osrg/gobgp/v4 (Go) SEMVER:introduced=4.4.0,fixed=4.5.0.
Is there a fix for CVE-2026-42285?: Yes. github.com/osrg/gobgp/v4 (Go): upgrade to 4.5.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-42285 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-42285?: Check whether you run github.com/osrg/gobgp/v4 (Go) or Osrg Gobgp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

github.com/osrg/gobgp/v4 (Go): upgrade to 4.5.0 or later
```
go get github.com/osrg/gobgp/v4@v4.5.0
```

Technical details

A nil pointer dereference exists in GoBGP version 4.4.0 within the AdjRib.Update function. The vulnerability is triggered when the server receives a BGP UPDATE message containing inconsistent attribute lengths. While the software correctly identifies the malformed attributes and attempts to treat the message as a 'withdraw' action, it fails to properly manage the internal state transition, leading to a nil pointer access in internal/pkg/table/adj.go. An unauthenticated remote peer can exploit this over the network to cause a fatal panic (SIGSEGV), resulting in a complete denial of service. This issue is resolved in version 4.5.0.

Affected products

osrg GoBGP 4.4.0

Identifiers

CVE-2026-42285
GHSA-p3w2-64xm-833j
GO-2026-5525

Timeline

2026-04-30: patched: Fixed in version 4.5.0
2026-05-07: disclosed: Public disclosure of CVE-2026-42285

References

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