CVE-2026-49837

תיאור (מקור, אנגלית)

GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Versions prior to 4.6.0 contain a BGP OPEN capability parsing issue where several concrete capability decoders may parse data from the full remaining capability buffer instead of the slice bounded by the declared capability length, `CapLen`. A malformed BGP OPEN message can cause bytes from a following capability to be interpreted as part of the current capability. The most security-relevant case is the 4-octet AS capability, where a capability with `CapLen == 0` may cause the parser to read bytes from the following capability as the 4-octet AS value. This parsed value may later affect peer AS validation during BGP session establishment. Version 4.6.0 patches the issue.

מדדים

CVSS 3.1

5.9 (MEDIUM) מקור הציון: CNA CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-4/10/2026

CWE

CWE-125

קישורים

• https://github.com/osrg/gobgp/commit/f02ca397821f6ca182ef4eb492c3cbc459552d7c
• https://github.com/osrg/gobgp/security/advisories/GHSA-gjrg-jjr3-56cm