TI-2026-38667 Aliases CVE-2026-53611

Looking Glass: Remote Code Execution via Unanchored Regular Expression in BGPASPath Input Validation

MEDIUM 53CWE-78Published 2026-09-02 · Updated 2026-09-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

Looking Glass is a modern, stateless network-diagnostic platform — a single self-contained Go binary that fronts a fleet of routers over SSH and exposes ping / traceroute / BGP lookups through a gRPC (ConnectRPC) API, an embedded SvelteKit web UI, and a lg-cli client. Prior to version 1.3.5, there is an OS Command Injection vulnerability resulting from an unanchored regular expression in the input validation layer. This issue has been patched in version 1.3.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01975 80th percentileScored 2026-11-07

Fix Fixed looking-glass (AS203038): 1.3.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
AS203038	looking-glass	before 1.3.5	1.3.5	Patch available	CNA

looking-glass VendorAS203038 Affected before 1.3.5 Fixed in 1.3.5 Patch available CNA

Remediation

Fix · CNA looking-glass (AS203038) Fixed in 1.3.5

Timeline

2026-10-02 Threatist record created from CVE-2026-53611

References

Other 2

Sources

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