CVE-2026-54776
CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, a CoreWCF service ho
CVSS
4.4
Medium
EPSS
0.1%
p1
KEV
—
Exploit Today
0
0-100
Published: Jul 8, 2026 · Last modified: Jul 9, 2026 · CWE-306
0.1%EPSS · 30 days0.1%
2026-07-092026-07-16
CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, a CoreWCF service hosted on Unix Domain Sockets with PosixIdentity client credentials can accept connections that skip the application/unixposix stream upgrade before dispatching messages, bypassing framing-layer identity checks in UnixPosixIdentitySecurityUpgradeProvider. This issue is fixed in versions 1.8.1 and 1.9.1.
- github.comhttps://github.com/CoreWCF/CoreWCF/commit/994431268e3362c0cd126450fe2a135c202551f3
- github.comhttps://github.com/CoreWCF/CoreWCF/commit/9af16955e51a57348dafce0019e259a092ef7440
- github.comhttps://github.com/CoreWCF/CoreWCF/commit/f2f1a05927a88b8a75fa0582fa8ed75eb891e463
- github.comhttps://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1
- github.comhttps://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1
- github.comhttps://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-wjpq-6766-7f5j
CVECVSSEPSSKEVRExploitTitleMod.
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——30In IOBit IOTransfer 4.3.1.1561, an unauthenticated attacker can send GET and POST requests to Airserv and gain arbitrary read/write access to the entire file-system (with admin privileges) on the victim's endpoint, which can result in data theft and remote code execution.8dCVE-2026-411769.8 CRI98.2%
——29Rclone is a command-line program to sync files and directories to and from different cloud storage providers. The RC endpoint `options/set` is exposed without `AuthRequired: true`, but it can mutate global runtime configuration, including the RC option block itself. Starting in version 1.45.0 and prior to version 1.73.5, an unauthenticated attacker can set `rc.NoAuth=true`, which disables the authorization gate for many RC methods registered with `AuthRequired: true` on reachable RC servers that are started without global HTTP authentication. This can lead to unauthorized access to sensitive administrative functionality, including configuration and operational RC methods. Version 1.73.5 patches the issue.2d