CVE-2026-45182

Name: CVE-2026-45182
Creator: NVD / NIST
Published: 2026-05-09T23:16:32.277+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.2/10EPSS 0.09%

Last modified Jun 17, 2026

CVE-2026-45182 is a low-severity vulnerability rated 2.2/10 on the CVSS scale. 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.. EPSS estimates a 0.09% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

2.2/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N

EPSS Probability

0.09%

0.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-441

References

Timeline

Published: May 9, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-45182?

How severe is CVE-2026-45182?

CVE-2026-45182 has a CVSS score of 2.2/10 (LOW severity). The EPSS model estimates a 0.09% probability of exploitation in the next 30 days.

How do I fix CVE-2026-45182?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-45182?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST