CVE-2026-45182

State: Published
Severity: 2.2 Low
Published: May 9, 2026
Updated: May 11, 2026
Reserved: May 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	2.2 Low	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N	mitre

Weaknesses

CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')

Affected Products

Product	Versions
GrapheneOSGrapheneOS	before 2026050400Affected

References

https://lowlevel.fun/posts/tiny-udp-cannon-android-vpn-bypass/
https://grapheneos.org/releases#2026050400
https://cyberinsider.com/grapheneos-fixes-android-vpn-leak-google-refused-to-patch/

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