CVE-2026-5122

LOW

osrg GoBGP BGP OPEN Message bgp.go DecodeFromBytes access control

Title source: cna
STIX 2.1

Description

A security flaw has been discovered in osrg GoBGP up to 4.3.0. This affects the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component BGP OPEN Message Handler. Performing a manipulation of the argument domainNameLen results in improper access controls. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitability is reported as difficult. The patch is named 2b09db390a3d455808363c53e409afe6b1b86d2d. It is suggested to install a patch to address this issue.

References (6)

Core 6
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-354154 | osrg GoBGP BGP OPEN Message bgp.go DecodeFromBytes access control
https://vuldb.com/vuln/354154
Signature, Permissions Required signature permissions-required
VDB-354154 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/vuln/354154/cti
Third Party Advisory third-party-advisory
Submit #780124 | GoBGP 4.3.0 Improper Handling of Length Parameter Inconsistency
https://vuldb.com/submit/780124
Patch issue-tracking patch
https://github.com/osrg/gobgp/pull/3343

Scores

CVSS v3 3.7
EPSS 0.0029
EPSS Percentile 20.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-266 CWE-284
Status published
Products (5)
osrg/gobgp < 4.4.0
osrg/GoBGP 4.0
osrg/GoBGP 4.1
osrg/GoBGP 4.2
osrg/GoBGP 4.3.0
Published Mar 30, 2026
Tracked Since Mar 30, 2026