Out-of-bounds Read Affecting github.com/osrg/gobgp/v4/packet/bgp package, versions <4.6.0
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMOSRGGOBGPV4PACKETBGP-17934807
- published10 Aug 2026
- disclosed9 Jul 2026
- creditUnknown
Introduced: 9 Jul 2026
CVE-2026-49837 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade github.com/osrg/gobgp/v4/packet/bgp to version 4.6.0 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read in the BGP OPEN capability parsing process. An attacker can influence peer AS validation and capability negotiation by sending a specially crafted BGP OPEN message with a malformed capability length, causing the parser to read bytes outside the declared boundary.