CVE-2026-5122
osrg GoBGP BGP OPEN Message bgp.go DecodeFromBytes access control
- State
- Published
- Severity
- 6.3 Medium
- Published
- Mar 30, 2026
- Updated
- Mar 30, 2026
- Reserved
- Mar 30, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS: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 | VulDB |
| 3.1 | 3.7 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C | VulDB |
| 3.0 | 3.7 Low | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C | VulDB |
| 2.0 | 2.6 Low | AV:N/AC:H/Au:N/C:N/I:P/A:N/E:ND/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
GoBGPosrg |
|
References
- VDB-354154 | osrg GoBGP BGP OPEN Message bgp.go DecodeFromBytes access controlvdb-entrytechnical-description
- VDB-354154 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #780124 | GoBGP 4.3.0 Improper Handling of Length Parameter Inconsistencythird-party-advisory
- https://github.com/osrg/gobgp/pull/3343issue-trackingpatch
- https://github.com/osrg/gobgp/commit/2b09db390a3d455808363c53e409afe6b1b86d2dpatch
- https://github.com/osrg/gobgp/product
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