Ubiquiti UniFi OS Improper Input Validation Vulnerability

Ubiquiti UniFi OS

Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection. Can be chained with CVE-2026-34909, CVE-2026-34908. Added to CISA KEV on 2026-06-23 (federal deadline 2026-06-26).

First seen: 23 Jun 2026
Last update: 23 Jun 2026, 12:00 UTC
Identifiers: CVE-2026-34908
CVE-2026-34909
CVE-2026-34910
Source: CISA KEV

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Ubiquiti UniFi OS Improper Input Validation Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: Ubiquiti UniFi OS
Ids: CVE-2026-34908, CVE-2026-34909, CVE-2026-34910

Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection. Can be chained with CVE-2026-34909, CVE-2026-34908. Added to CISA KEV on 2026-06-23 (federal deadline 2026-06-26).

## Steps
1. Search the repo, its CI and infra config for Ubiquiti UniFi OS. If present, report the version in use and whether it's affected.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-34908") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b https://nvd.nist.gov/vuln/detail/CVE-2026-34908 https://nvd.nist.gov/vuln/detail/CVE-2026-34909 https://nvd.nist.gov/vuln/detail/CVE-2026-34910
https://pwned.coffee/i/ubiquiti-unifi-os-improper-input-validation-vulnerability

Sources

Totalone hot coffee