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CVE-2026-45047— bird-lg-go: Fatal Out-of-Memory (OOM) Denial of Service via Unbounded JSON Decoding

Quick assessment

Affected
xddxdd bird-lg-go
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Bird-lg-go是Yuhui Xu个人开发者的一个BGP路由查询工具。 bird-lg-go 1.4.5之前版本存在资源管理错误漏洞，该漏洞源于apiHandler处理用户提供的JSON有效载荷时未限制最大读取大小，可能导致未认证的远程攻击者通过流式传输大量JSON数据导致内存耗尽。

CVSS 7.5 · High EPSS 0.44% · P37

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
xddxdd bird-lg-go < 1.4.5 affected
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I. Basic Information for CVE-2026-45047

Vulnerability Information
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Vulnerability Title
bird-lg-go: Fatal Out-of-Memory (OOM) Denial of Service via Unbounded JSON Decoding
Source: CVE Program / CVE List V5
Vulnerability Description
bird-lg-go is a BIRD looking glass in Go. Prior to 1.4.5, the apiHandler (and similarly webHandlerTelegramBot) processes user-provided JSON payloads by directly using json.NewDecoder(r.Body).Decode(&request) without restricting the maximum read size. An unauthenticated remote attacker can stream an extremely large, endless JSON payload (e.g., several Gigabytes of padding) over a single TCP connection. Because Go's JSON decoder attempts to allocate memory for the entire parsed structure, this rapidly exhausts the host's physical RAM or container limits, leading to an unrecoverable fatal error: runtime: out of memory. This vulnerability is fixed in 1.4.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Bird-lg-go 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bird-lg-go是Yuhui Xu个人开发者的一个BGP路由查询工具。 bird-lg-go 1.4.5之前版本存在资源管理错误漏洞，该漏洞源于apiHandler处理用户提供的JSON有效载荷时未限制最大读取大小，可能导致未认证的远程攻击者通过流式传输大量JSON数据导致内存耗尽。
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
xddxdd bird-lg-go < 1.4.5 -

II. Public POCs for CVE-2026-45047

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7027 chars
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III. Intelligence Information for CVE-2026-45047

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Vendor Advisories for CVE-2026-45047 (1)

IV. Related Vulnerabilities

Same weakness: CWE-400

V. Comments for CVE-2026-45047

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