How severe is CVE-2026-45182?

CVE-2026-45182 has a CVSS 3.x base score of 2.2, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-45182 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-45182?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45182 have an EU (EUVD) identifier?

Yes. CVE-2026-45182 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28944.

When was CVE-2026-45182 published?

CVE-2026-45182 was published on 2026-05-09 and last updated on 2026-06-17.

CVE-2026-45182

CVE-2026-45182 is a low-severity vulnerability with a CVSS 3.x base score of 2.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-441.

Key facts

Severity: Low (CVSS 3.x base score 2.2)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28944
Weakness: CWE-441
Published: 2026-05-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-45182?: 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.
How severe is CVE-2026-45182?: CVE-2026-45182 has a CVSS 3.x base score of 2.2, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-45182 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-45182?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45182 have an EU (EUVD) identifier?: Yes. CVE-2026-45182 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28944.
When was CVE-2026-45182 published?: CVE-2026-45182 was published on 2026-05-09 and last updated on 2026-06-17.

References

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