CVE-2026-5122
osrg GoBGP BGP OPEN Message bgp.go DecodeFromBytes access control
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.
INFO
Published Date :
March 30, 2026, 3:16 p.m.
Last Modified :
April 8, 2026, 4:07 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Install the patch for the BGP OPEN Message Handler.
- Update osrg GoBGP to version 4.3.0 or later.
- Review access control mechanisms for domain name handling.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-5122.
| URL | Resource |
|---|---|
| https://github.com/osrg/gobgp/ | Product |
| https://github.com/osrg/gobgp/commit/2b09db390a3d455808363c53e409afe6b1b86d2d | Patch |
| https://github.com/osrg/gobgp/pull/3343 | Issue Tracking |
| https://vuldb.com/submit/780124 | Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/354154 | Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/354154/cti | Permissions Required VDB Entry |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5122 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-5122
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-5122 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-5122 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 08, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:osrg:gobgp:*:*:*:*:*:*:*:* versions up to (excluding) 4.4.0 Added Reference Type VulDB: https://github.com/osrg/gobgp/ Types: Product Added Reference Type VulDB: https://github.com/osrg/gobgp/commit/2b09db390a3d455808363c53e409afe6b1b86d2d Types: Patch Added Reference Type VulDB: https://github.com/osrg/gobgp/pull/3343 Types: Issue Tracking Added Reference Type VulDB: https://vuldb.com/submit/780124 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/vuln/354154 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/vuln/354154/cti Types: Permissions Required, VDB Entry -
New CVE Received by [email protected]
Mar. 30, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N Added CVSS V2 (AV:N/AC:H/Au:N/C:N/I:P/A:N) Added CWE CWE-284 Added CWE CWE-266 Added Reference https://github.com/osrg/gobgp/ Added Reference https://github.com/osrg/gobgp/commit/2b09db390a3d455808363c53e409afe6b1b86d2d Added Reference https://github.com/osrg/gobgp/pull/3343 Added Reference https://vuldb.com/submit/780124 Added Reference https://vuldb.com/vuln/354154 Added Reference https://vuldb.com/vuln/354154/cti