Home

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.

PUBLISHED Reserved 2026-03-30 | Published 2026-03-30 | Updated 2026-03-30 | Assigner VulDB




MEDIUM: 6.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X
LOW: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C
LOW: 3.7CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C
2.6AV:N/AC:H/Au:N/C:N/I:P/A:N/E:ND/RL:OF/RC:C

Problem types

Improper Access Controls

Incorrect Privilege Assignment

Product status

4.0
affected

4.1
affected

4.2
affected

4.3.0
affected

Timeline

2026-03-30:Advisory disclosed
2026-03-30:VulDB entry created
2026-03-30:VulDB entry last update

Credits

rensiru (VulDB User) reporter

References

vuldb.com/vuln/354154 (VDB-354154 | osrg GoBGP BGP OPEN Message bgp.go DecodeFromBytes access control) vdb-entry technical-description

vuldb.com/vuln/354154/cti (VDB-354154 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/780124 (Submit #780124 | GoBGP 4.3.0 Improper Handling of Length Parameter Inconsistency) third-party-advisory

github.com/osrg/gobgp/pull/3343 issue-tracking patch

github.com/...ommit/2b09db390a3d455808363c53e409afe6b1b86d2d patch

github.com/osrg/gobgp/ product

cve.org (CVE-2026-5122)

nvd.nist.gov (CVE-2026-5122)

Download JSON