CVE-2026-45182
GrapheneOS VPN IP Leak via UDP Traffic
Publication date: 2026-05-09
Last updated on: 2026-05-09
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| grapheneos | grapheneos | to 2026050400 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-441 | The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in GrapheneOS versions before 2026050400. It allows attackers to discover the real IP address of a VPN user due to an optimization related to registerQuicConnectionClosePayload. Specifically, an application can cause the system_server to transmit UDP traffic on its behalf. This issue occurs when the "Block connections without VPN" and "Always-on VPN" settings are enabled.
How can this vulnerability impact me? :
The vulnerability can impact users by exposing their real IP address even when they are connected through a VPN. This undermines the privacy and anonymity that VPNs are supposed to provide, potentially allowing attackers to track or identify the user's actual network location.