CVE-2026-81868

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Source
https://cve.org/CVERecord?id=CVE-2026-81868
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-81868.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-81868
Aliases
Published
2026-09-17T15:36:23Z
Modified
2026-10-22T10:33:36Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N CVSS Calculator
Summary
Steeltoe: Header-forwarded client cert lacks proof of private-key possession
Details

Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. Prior to 4.3.0, Steeltoe.Security.Authorization.Certificate deployments using AddOrgAndSpacePolicies() and UseCertificateAuthorization() trust the public certificate supplied in the X-Client-Cert request header without proving possession of the corresponding private key. Common Cloud Foundry routers do not remove this header from inbound requests. When inbound requests are not restricted to a known trusted proxy source IP, an attacker who obtains the public certificate of an application instance in the target organization or space and can reach the application can spoof X-Client-Cert to bypass the SameOrg and SameSpace policies for the certificate validity period. This issue is fixed in version 4.3.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-288",
        "CWE-295"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81868.json"
}
References

Affected packages

Git / github.com/steeltoeoss/steeltoe

Affected ranges

Type
GIT
Repo
https://github.com/steeltoeoss/steeltoe
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a56a5e5a324a1581cbfcdf726dbca3e25b604f86
Fixed
b626ef3d60aaf19c68eeeed5ee81045406c8c6d0
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "4.3.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "b626ef3d60aaf19c68eeeed5ee81045406c8c6d0"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "4.3.0",
            "range": [
                {
                    "fixed": "a56a5e5a324a1581cbfcdf726dbca3e25b604f86"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

3.*
3.0.0
3.0.0-m1
3.0.0-m2
3.0.0-m3
3.0.0-rc1
3.0.1
3.0.2
3.0.x_2021-Jan-12
3.1.0
3.1.0-rc1
3.1.0-rc2
3.1.1
3.2.0
3.2.0-rc1
4.*
4.0.0
4.0.0-beta1
4.0.0-rc1
4.1.0
4.2.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-81868.json"