Vulnerability · Published May 9, 2026 · Assigned by mitre
CVE-2026-45182
Low 2.2
In plain English
A low-severity security flaw in GrapheneOS from GrapheneOS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Severity (CVSS 3.1)2.2Low
Exploit odds (30 days)<0.1%top 99.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GrapheneOS | GrapheneOS | 0 – before 2026050400 |
Weakness: CWE-441 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N