CVE-2026-45182: Grapheneos

Low severity, CVSS 2.2. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Grapheneos Grapheneos: before 2026050400 (fixed in 2026050400)

Published 2026-05-09. Last modified 2026-07-24.