PT-2026-39421 · Unknown · Grapheneos

Published 2026-05-09 · Updated 2026-05-12 · CVE-2026-45182

Positive Technologies (AI Summary)

CVSS v3.1

2.2

Low

Base vector

AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions GrapheneOS versions prior to 2026050400

Description An optimization in the registerQuicConnectionClosePayload function allows attackers to discover the real IP address of a VPN user. This occurs because an application can cause the system server to transmit UDP traffic on its behalf when both "Block connections without VPN" and "Always-on VPN" settings are enabled.

Recommendations Update to version 2026050400 or later.

Exploit

Fix

Weakness Enumeration

CWE-441

Related Identifiers

CVE-2026-45182

Affected Products

Grapheneos

References · 10

• 🔥 https://lowlevel.fun/posts/tiny-udp-cannon-android-vpn-bypass · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-45182 · Security Note
• https://t.me/cveNotify/162891 · Telegram Post
• https://twitter.com/CVEnew/status/2053537510358429753 · Twitter Post
• https://t.me/CVEtracker/53252 · Telegram Post
• https://cyberinsider.com/grapheneos-fixes-android-vpn-leak-google-refused-to-patch · Note
• https://twitter.com/SecureChap/status/2054232035460358372 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2053267630971105462 · Twitter Post
• https://twitter.com/infoflowcloud/status/2053539741971128800 · Twitter Post
• https://grapheneos.org/releases#2026050400 · Note