xddxdd bird-lg-go up to 1.4.4 JSON Decoder resource consumption

Summaryinfo

A vulnerability has been found in xddxdd bird-lg-go up to 1.4.4 and classified as problematic. Impacted is an unknown function of the component JSON Decoder. This manipulation causes resource consumption. This vulnerability is handled as CVE-2026-45047. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in xddxdd bird-lg-go up to 1.4.4. Affected by this vulnerability is an unknown part of the component JSON Decoder. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-45047 since 05/08/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.4.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-32583). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• xddxdd

Name

• bird-lg-go

Version

• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4

Website

• Product: https://github.com/xddxdd/bird-lg-go/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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