CVE-2026-54774

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Source
https://cve.org/CVERecord?id=CVE-2026-54774
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54774.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54774
Aliases
Published
2026-07-08T22:17:07.314Z
Modified
2026-07-11T03:54:07.215927437Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
CoreWCF: SamlSerializer skips SignatureValue verification when SAML signing token is not an X.509 certificate
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, SamlSerializer skips final SignatureValue verification when a CoreWCF service validates SAML tokens using a non-X.509 signing token, allowing an attacker to reference a non-X.509 SecurityToken key identifier and bypass assertion signature verification. This issue is fixed in versions 1.8.1 and 1.9.1.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54774.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-345",
        "CWE-347"
    ]
}
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
65d09022749854ba943e376aefb958dec05b00d8
Fixed
b914495ce63c44924664643b60a262e7595081a4
Fixed
e7454132876ecc7e2cf80e541a44376eeb54979b
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "1.9.0"
        },
        {
            "fixed": "1.9.1"
        },
        {
            "introduced": "0"
        },
        {
            "fixed": "1.8.1"
        }
    ]
}

Affected versions

v1.*
v1.8.0
v1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54774.json"