Real IP disclosure via unchecked QUIC payload proxy
Published May 9, 2026 · Updated May 9, 2026
VPN bypass in GrapheneOS before 2026050400 allows local users to disclose the device's real IP address through a malicious app. registerQuicConnectionClosePayload accepts an arbitrary payload and UDP socket without a permission check, then system_server sends the payload over the physical network outside VPN routing. Exploitation requires the app to run while Always-on VPN and Block connections without VPN are enabled; the bounded impact is real-IP disclosure.
Summary
What happened
VPN bypass in GrapheneOS before 2026050400 allows local users to disclose the device's real IP address through a malicious app. registerQuicConnectionClosePayload accepts an arbitrary payload and UDP socket without a permission check, then system_server sends the payload over the physical network outside VPN routing. Exploitation requires the app to run while Always-on VPN and Block connections without VPN are enabled; the bounded impact is real-IP disclosure.
The record
- CVE
- CVE-2026-45182
- Published
- May 9, 2026
- Updated
- May 9, 2026
- Vendor
- GrapheneOS
- Product
- GrapheneOS
- Classifications
- CWE-441, T1422
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- May 9, 2026CVE publishedPublication date reported by the CVE source.
- May 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2026050400
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- QUIC VPN Bypass PoCproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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