osrg GoBGP bgp.go DecodeFromBytes off-by-one_CVE-2026-5123

6.3 / 10

MEDIUM

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

Description

A weakness has been identified in osrg GoBGP up to 4.3.0. This impacts the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go. Executing a manipulation of the argument data[1] can lead to off-by-one. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is said to be difficult. This patch is called 67c059413470df64bc20801c46f64058e88f800f. A patch should be applied to remediate this issue.

Basic Information

ID CVE-2026-5123

Source VulDB

Published Mar 30, 2026 at 15:15

Modified Apr 1, 2026 at 18:10

Affected Product

Vendor osrg

Product GoBGP

Version 4.0

Affected Versions osrg GoBGP 4.0
osrg GoBGP 4.1
osrg GoBGP 4.2
osrg GoBGP 4.3.0

CWE Classification

CWE-193 CWE-189

References

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    "lastseen": "",
    "description": "A weakness has been identified in osrg GoBGP up to 4.3.0. This impacts the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go. Executing a manipulation of the argument data[1] can lead to off-by-one. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is said to be difficult. This patch is called 67c059413470df64bc20801c46f64058e88f800f. A patch should be applied to remediate this issue.",
    "published": "2026-03-30T15:15:14.229Z",
    "modified": "2026-04-01T18:10:27.344Z",
    "type": "cve",
    "title": "osrg GoBGP bgp.go DecodeFromBytes off-by-one",
    "source": "VulDB",
    "references": "https://vuldb.com/vuln/354155\nhttps://vuldb.com/vuln/354155/cti\nhttps://vuldb.com/submit/780179\nhttps://github.com/osrg/gobgp/pull/3342\nhttps://github.com/osrg/gobgp/commit/67c059413470df64bc20801c46f64058e88f800f\nhttps://github.com/osrg/gobgp/",
    "id": "CVE-2026-5123",
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    "cvelist": null,
    "sourceData": "osrg GoBGP 4.0\nosrg GoBGP 4.1\nosrg GoBGP 4.2\nosrg GoBGP 4.3.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.3,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X",
        "version": "4.0"
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    "product": "GoBGP",
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}