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CVE-2026-34909 is a CWE-22 path traversal vulnerability in Ubiquiti UniFi OS. A malicious actor with network access can access files on the underlying system and potentially manipulate those files to obtain access to an underlying account. The issue affects multiple UniFi OS product families running vulnerable firmware, including UniFi OS Server 5.0.6 and earlier.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
Repository contains two security artifacts and supporting documentation: a Python exploit script (CVE-2026-34910.py) and a Nuclei template (CVE-2026-34908-unifi-auth-bypass.yaml), plus README and license. Because this repository includes a framework artifact, the main exploit logic is split between a Nuclei detection template for CVE-2026-34908 and a standalone Python PoC for CVE-2026-34910/CVE-2026-34909. The Python script is the primary offensive component. It disables TLS verification, accepts a target URL, and exposes three modes: `--check` to verify the auth bypass by requesting the internal `latest_package` handler through `/api/auth/validate-sso/..%2f..%2f..%2f`, direct command execution by injecting `evil;<command>` into the `pkg_name` query parameter with `by_cmd=true`, and `--read <path>` to retrieve arbitrary files through a traversal path under `/app-assets/users/`. The script treats HTTP 200 responses from the internal handler as success and includes a proof helper that attempts to create `/tmp/PWNED_34910` on the target. The Nuclei YAML is a detection-only template for CVE-2026-34908. It sends a single crafted GET request to `/api/auth/validate-sso/..%2f..%2f..%2fproxy/users/api/v2/ucs/update/latest_package` and matches on HTTP 200 plus response markers such as `pkg_name` and `required`, confirming unauthorized reachability of the internal handler without executing a payload. Overall purpose: demonstrate and operationalize a chain of UniFi OS vulnerabilities affecting pre-SAB-064 systems: CVE-2026-34908 auth bypass, CVE-2026-34909 arbitrary file read, and CVE-2026-34910 unauthenticated command injection RCE. The repository is not just a detector; it contains working exploit code capable of unauthenticated remote command execution and file disclosure against vulnerable UniFi OS Server targets.
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72 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Ubiquiti UniFi OS vulnerability that the actor attempted to chain with two other flaws for root-level remote code execution; CISA identified it as actively exploited.
Vulnerability in Ubiquiti UniFi OS targeted as part of the actor's multi-vector exploitation campaign.
One of three chained vulnerabilities used in attempted remote-code-execution attacks against unpatched Ubiquiti UniFi OS devices.
Critical CVSS 10.0 path-traversal flaw in UniFi OS that can be chained with CVE-2026-34908 to bypass authentication and access underlying system files, potentially exposing account-related files and secrets.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.