PT-2026-39903 · Unknown · Bird-Lg-Go

9Bakabaka · Published 2026-05-11 · Updated 2026-06-25 · CVE-2026-45047

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions bird-lg-go versions prior to 1.4.5

Description The apiHandler and webHandlerTelegramBot functions process user-provided JSON payloads using json.NewDecoder(r.Body).Decode(&request) without restricting the maximum read size. An unauthenticated remote attacker can stream an extremely large or endless JSON payload over a single TCP connection. Since the Go JSON decoder attempts to allocate memory for the entire parsed structure, this can exhaust the host's physical RAM or container limits, triggering a runtime out of memory fatal error. This leads to the Linux OOM Killer terminating the daemon, resulting in a Remote Denial of Service (RDoS).

Recommendations Update to version 1.4.5.

Exploit

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2026-45047

GHSA-39QR-RC93-VHQM

GO-2026-5077

Affected Products

Bird-Lg-Go

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45047.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-45047 · Security Note
• https://osv.dev/vulnerability/GO-2026-5077 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-45047 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-39qr-rc93-vhqm · Vendor Advisory
• https://github.com/xddxdd/bird-lg-go/security/advisories/GHSA-39qr-rc93-vhqm · Note
• https://github.com/xddxdd/bird-lg-go/commit/0ff87024cb9ed01fc5f5fdc6f4603fce4c123922 · Note
• https://github.com/xddxdd/bird-lg-go/releases/tag/v1.4.5 · Note
• https://github.com/xddxdd/bird-lg-go · Note
• https://twitter.com/infoflowcloud/status/2059719199379857426 · Twitter Post
• https://twitter.com/CVEnew/status/2059718150556643595 · Twitter Post