high7.5
CVE-2026-41643
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/osrg/gobgp/v4 | <= 4.2.0 | 4.3.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Osrg | Gobgp | before 4.3.0 |