osrg GoBGP up to 4.3.0 BGP OPEN Message pkg/packet/bgp/bgp.go DecodeFromBytes domainNameLen access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.6$0-$5k3.59-

Summaryinfo

A vulnerability labeled as problematic has been found in osrg GoBGP up to 4.3.0. This impacts the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component BGP OPEN Message Handler. Executing a manipulation of the argument domainNameLen can lead to access control. The identification of this vulnerability is CVE-2026-5122. The attack may be launched remotely. There is no exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability has been found in osrg GoBGP up to 4.3.0 and classified as problematic. This vulnerability affects the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component BGP OPEN Message Handler. The manipulation of the argument domainNameLen with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect integrity.

The advisory is available at github.com. This vulnerability was named CVE-2026-5122. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Applying the patch 2b09db390a3d455808363c53e409afe6b1b86d2d is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17091). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 2b09db390a3d455808363c53e409afe6b1b86d2d

Timelineinfo

03/30/2026 Advisory disclosed
03/30/2026 +0 days VulDB entry created
03/30/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 3343
Status: Confirmed

CVE: CVE-2026-5122 (🔒)
GCVE (CVE): GCVE-0-2026-5122
GCVE (VulDB): GCVE-100-354154
EUVD: 🔒

Entryinfo

Created: 03/30/2026 09:51
Updated: 03/30/2026 18:37
Changes: 03/30/2026 09:51 (58), 03/30/2026 18:37 (1)
Complete: 🔍
Submitter: rensiru
Cache ID: 216:207:103

Submitinfo

Accepted

  • Submit #780124: GoBGP 4.3.0 Improper Handling of Length Parameter Inconsistency (by rensiru)

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