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TI-2026-32898 Aliases CVE-2026-45047GHSA-39qr-rc93-vhqm

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

Priority LOW 33CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00441 38th percentileScored 2026-11-07
Fix Fixed bird-lg-go (xddxdd): 1.4.5github.com/xddxdd/bird-lg-go (Go): 0.0.0-20260507060110-0ff87024cb9e

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
xddxddbird-lg-gobefore 1.4.51.4.5Patch availableCNA
—github.com/xddxdd/bird-lg-go (Go)before 0.0.0-20260507060110-0ff87024cb9e0.0.0-20260507060110-0ff87024cb9ePatch availableGHSA-39qr-rc93-vhqm
  • bird-lg-go Vendorxddxdd Affected before 1.4.5 Fixed in 1.4.5 Patch available CNA
  • github.com/xddxdd/bird-lg-go (Go) Vendor— Affected before 0.0.0-20260507060110-0ff87024cb9e Fixed in 0.0.0-20260507060110-0ff87024cb9e Patch available GHSA-39qr-rc93-vhqm

Remediation

  • Fix · CNA bird-lg-go (xddxdd) Fixed in 1.4.5
  • Fix · GHSA-39qr-rc93-vhqm github.com/xddxdd/bird-lg-go (Go) Fixed in 0.0.0-20260507060110-0ff87024cb9e Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45047
  2. 2026-10-03 Alias added: GHSA-39qr-rc93-vhqm

References

Advisory 1

Other 4

  • TI-2026-21342 An Argument Injection vulnerability exists in bird-lg-go before commit 6187a4e. CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences