CVE-2026-45047: Xddxdd Bird-LG-Go

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Xddxdd Bird-LG-Go: before 1.4.5 (fixed in 1.4.5)

Published 2026-05-27. Last modified 2026-06-17.