Improper Validation of Array Index Affecting gobgp package, versions <4.3.0-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.54% (43rd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-GOBGP-16632984
  • published11 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-41643  (opens in a new tab)
CWE-129  (opens in a new tab)

How to fix?

Upgrade Debian:unstable gobgp to version 4.3.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gobgp package and not the gobgp package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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 Base Scores

version 3.1