CVE-2026-54776

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Source
https://cve.org/CVERecord?id=CVE-2026-54776
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54776.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54776
Aliases
Published
2026-07-08T22:04:39.200Z
Modified
2026-07-11T03:54:39.498003265Z
Severity
  • 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
CoreWCF: Unix Domain Socket PosixIdentity transport accepts connections that skip the security upgrade
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54776.json"
}
References

Affected packages

Git / github.com/corewcf/corewcf

Affected ranges

Type
GIT
Repo
https://github.com/corewcf/corewcf
Events
Introduced
39b2f02978e497955a560c72b5ccdff5c0dbcda1
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1f7a0811da5128db40fd7b868ae0aac0c581f91f
Fixed
7c0920fe16adc497efae82881ac0f1e4d7ac98d0
Fixed
994431268e3362c0cd126450fe2a135c202551f3
Fixed
9af16955e51a57348dafce0019e259a092ef7440
Fixed
f2f1a05927a88b8a75fa0582fa8ed75eb891e463
Database specific 
{
    "extracted_events": [
        {
            "introduced": "1.9.0"
        },
        {
            "fixed": "1.9.1"
        },
        {
            "introduced": "0"
        },
        {
            "fixed": "1.8.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.8.0
v1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54776.json"