CVE-2026-7737 - Vulnerability Details

- osrg GoBGP BMP Parser bmp.go BMPStatisticsReport.ParseBody out-of-bounds

Description

A vulnerability was identified in osrg GoBGP up to 4.3.0. Affected by this issue is the function BMPPeerUpNotification.ParseBody/BMPStatisticsReport.ParseBody of the file pkg/packet/bmp/bmp.go of the component BMP Parser. The manipulation leads to out-of-bounds read. The attack can be initiated remotely. Upgrading to version 4.4.0 can resolve this issue. The identifier of the patch is bc77597d42335c78464bc8e15a471d887bbdf260. Upgrading the affected component is recommended.

Published: 2026-05-04

Score: 6.9 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

An out‑of‑bounds read vulnerability exists in the BMP parser of GoBGP, specifically within the BMPPeerUpNotification.ParseBody and BMPStatisticsReport.ParseBody functions in bmp.go. Sending a crafted BMP message can cause the parser to read beyond the bounds of a buffer, potentially leaking sensitive memory contents or causing a crash. The vulnerability is linked to CWE-119 and CWE-125.

Affected Systems

The affected product is osrg GoBGP, in all releases up to and including 4.3.0. The issue has been addressed in release 4.4.0. The patch that resolves this flaw is identified by commit bc77597d42335c78464bc8e15a471d887bbdf260.

Risk and Exploitability

The CVSS score of 6.9 indicates a moderate severity, and the exploit can be triggered remotely by an attacker who can send BMP packets to the server; authentication is not required. Because the vulnerability involves an out‑of‑bounds read, a successful exploit could lead to information disclosure or a denial of service if the service crashes. The EPSS score is not available and the vulnerability is not listed in CISA KEV, suggesting it is a known risk but not widely exploited yet. The risk is mitigated by applying the official patch or upgrading to the fixed version.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

osrg

GoBGP

affected

Version	Status	Constraints
`4.0`	affected	—
`4.1`	affected	—
`4.2`	affected	—
`4.3.0`	affected	—
`4.4.0`	unaffected	—

No data.

Vendor Product Confidence Versions

Osrg

Gobgp

95%

Version	Status	Scheme	Platform
`4.0`	affected	generic	—
`4.1`	affected	generic	—
`4.2`	affected	generic	—
`4.3.0`	affected	semver	—
`4.4.0`	unaffected	semver	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Upgrade the GoBGP installation to version 4.4.0 or later, which includes the fix identified by commit bc77597d42335c78464bc8e15a471d887bbdf260.
If upgrading is not immediately feasible, disable or restrict the BMP protocol interface to trusted peers only to prevent unauthenticated BMP traffic from reaching the vulnerable component.
Deploy network‑layer filtering (e.g., firewall rules) to block BMP traffic from untrusted sources while monitoring logs for anomalous BMP messages that could indicate exploitation attempts.

Generated by OpenCVE AI on May 4, 2026 at 07:23 UTC.

Tracking

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Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00047.

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/osrg/gobgp/
https://github.com/osrg/gobgp/commit/bc77597d42335c78464bc8e15a471d887bbdf260
https://github.com/osrg/gobgp/releases/tag/v4.4.0
https://vuldb.com/submit/807605
https://vuldb.com/vuln/360912
https://vuldb.com/vuln/360912/cti

History

Tue, 05 May 2026 01:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 04 May 2026 06:45:00 +0000

Type	Values Removed	Values Added
Description		A vulnerability was identified in osrg GoBGP up to 4.3.0. Affected by this issue is the function BMPPeerUpNotification.ParseBody/BMPStatisticsReport.ParseBody of the file pkg/packet/bmp/bmp.go of the component BMP Parser. The manipulation leads to out-of-bounds read. The attack can be initiated remotely. Upgrading to version 4.4.0 can resolve this issue. The identifier of the patch is bc77597d42335c78464bc8e15a471d887bbdf260. Upgrading the affected component is recommended.
Title		osrg GoBGP BMP Parser bmp.go BMPStatisticsReport.ParseBody out-of-bounds
First Time appeared		Osrg Osrg gobgp
Weaknesses		CWE-119 CWE-125
CPEs		cpe:2.3:a:osrg:gobgp::::::::
Vendors & Products		Osrg Osrg gobgp
References		https://github.com/osrg/gobgp/ https://github.com/osrg/gobgp/commit/bc77597d42335c78464bc8e15a471d887bbdf260 https://github.com/osrg/gobgp/releases/tag/v4.4.0 https://vuldb.com/submit/807605 https://vuldb.com/vuln/360912 https://vuldb.com/vuln/360912/cti
Metrics		cvssV2_0 `{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C'}` cvssV3_0 `{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C'}` cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C'}` cvssV4_0 `{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X'}`

Subscriptions

Osrg Gobgp

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-05-04T05:45:12.716Z

Updated: 2026-05-05T00:57:22.608Z

Reserved: 2026-05-03T16:16:33.784Z

Link: CVE-2026-7737

Vulnrichment

Updated: 2026-05-05T00:57:17.912Z

NVD

Status : Received

Published: 2026-05-04T07:16:01.700

Modified: 2026-05-04T07:16:01.700

Link: CVE-2026-7737

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-05-04T07:45:05Z

Weaknesses

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

Exploitation none

Automatable yes

Technical Impact partial

Subscriptions

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