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CVE-2026-7736— osrg GoBGP mrt.go parseRibEntry integer underflow

Quick assessment

Affected
osrg GoBGP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GoBGP是osrg开源的一种开源的边界网关协议（BGP）实现。 GoBGP 4.3.0及之前版本存在数字错误漏洞，该漏洞源于文件pkg/packet/mrt/mrt.go的函数parseRibEntry存在整数下溢，攻击者可远程执行攻击。

CVSS 7.3 · High EPSS 0.63% · P48

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProduct Version RangeStatus
osrg GoBGP 4.0 affected
4.1 affected
4.2 affected
4.3.0 affected
4.4.0 unaffected
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I. Basic Information for CVE-2026-7736

Vulnerability Information
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Vulnerability Title
osrg GoBGP mrt.go parseRibEntry integer underflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in osrg GoBGP up to 4.3.0. Affected by this vulnerability is the function parseRibEntry of the file pkg/packet/mrt/mrt.go. Executing a manipulation can lead to integer underflow. It is possible to launch the attack remotely. Upgrading to version 4.4.0 addresses this issue. This patch is called 76d911046344a3923cbe573364197aa081944592. It is suggested to upgrade the affected component.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
GoBGP 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GoBGP是osrg开源的一种开源的边界网关协议（BGP）实现。 GoBGP 4.3.0及之前版本存在数字错误漏洞，该漏洞源于文件pkg/packet/mrt/mrt.go的函数parseRibEntry存在整数下溢，攻击者可远程执行攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
osrg GoBGP 4.0 cpe:2.3:a:osrg:gobgp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7736

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III. Intelligence Information for CVE-2026-7736

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Patches & Fixes for CVE-2026-7736 (1)

Vendor Pages for CVE-2026-7736 (1)

Same Patch Batch · osrg · 2026-05-04 · 4 CVEs total

CVE-2026-7735 7.3 HIGH osrg GoBGP AIGP Attribute bgp.go PathAttributeAigp.DecodeFromBytes buffer overflow
CVE-2026-7734 5.3 MEDIUM osrg GoBGP SRv6 L3 Service prefix_sid.go SRv6L3ServiceAttribute.DecodeFromBytes denial of
CVE-2026-7737 5.3 MEDIUM osrg GoBGP BMP Parser bmp.go BMPStatisticsReport.ParseBody out-of-bounds

IV. Related Vulnerabilities

Same product: GoBGP
Same vendor: osrg
Same weakness: CWE-191

V. Comments for CVE-2026-7736

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