CVE-2026-45182
Low
Description
GrapheneOS before 2026050400 allows attackers to discover the real IP address of a VPN user as a consequence of a registerQuicConnectionClosePayload optimization, because an application can let system_server transmit UDP traffic on its behalf. This occurs when the "Block connections without VPN" and "Always-on VPN" settings are enabled.
SeverityLow
CVSS2.2
Exploit probability—
ProductGrapheneOS
PublishedMay 9, 2026
First seenMay 9, 2026
Weakness typeCWE-441CWE-441
How to fix
Update
- GrapheneOS GrapheneOS2026050400 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| GrapheneOS GrapheneOS | v < 2026050400 | 2026050400 |
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