GrapheneOS prior 2026050400 confused deputy

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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2.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in GrapheneOS. This issue affects some unknown processing. Executing a manipulation can lead to confused deputy. This vulnerability is handled as CVE-2026-45182. It is possible to launch the attack on the local host. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in GrapheneOS. This vulnerability affects some unknown functionality. The manipulation with an unknown input leads to a confused deputy vulnerability. The CWE definition for the vulnerability is CWE-441. The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The advisory is shared for download at lowlevel.fun. This vulnerability was named CVE-2026-45182 since 05/10/2026. The exploitation appears to be difficult. The attack needs to be approached locally. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 2026050400 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.3
VulDB Meta Temp Score: 2.3

VulDB Base Score: 2.2
VulDB Temp Score: 2.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 2.5
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Confused deputy
CWE: CWE-441
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: GrapheneOS 2026050400

Timelineinfo

05/10/2026 Advisory disclosed
05/10/2026 +0 days CVE reserved
05/10/2026 +0 days VulDB entry created
05/10/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: lowlevel.fun
Status: Confirmed

CVE: CVE-2026-45182 (🔒)
GCVE (CVE): GCVE-0-2026-45182
GCVE (VulDB): GCVE-100-362476

Entryinfo

Created: 05/10/2026 08:57
Changes: 05/10/2026 08:57 (60)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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