Vulnerability Instance

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{
    "url": "http://public2.vulnerablecode.io/api/vulnerabilities/81097?format=api",
    "vulnerability_id": "VCID-7zbf-pw9h-1bc5",
    "summary": "authentik is an open-source identity provider. Prior to version 2026.2.3, the WS-Federation provider validates the user-supplied wreply parameter using a raw string prefix check rather than proper URL parsing. An attacker who can craft a login link can supply a wreply value on a different origin that passes the check (e.g. https://portal.example.com.evil.tld/) causing the victim's browser to POST the signed WS-Federation login response to attacker-controlled infrastructure. This issue has been patched in version 2026.2.3.",
    "aliases": [
        {
            "alias": "CVE-2026-41569"
        }
    ],
    "fixed_packages": [],
    "affected_packages": [],
    "references": [
        {
            "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2026-41569",
            "reference_id": "",
            "reference_type": "",
            "scores": [
                {
                    "value": "0.00045",
                    "scoring_system": "epss",
                    "scoring_elements": "0.14296",
                    "published_at": "2026-06-11T12:55:00Z"
                },
                {
                    "value": "0.00045",
                    "scoring_system": "epss",
                    "scoring_elements": "0.14416",
                    "published_at": "2026-06-12T12:55:00Z"
                }
            ],
            "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-41569"
        },
        {
            "reference_url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-995q-72cw-cfw3",
            "reference_id": "GHSA-995q-72cw-cfw3",
            "reference_type": "",
            "scores": [
                {
                    "value": "6.9",
                    "scoring_system": "cvssv4",
                    "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
                },
                {
                    "value": "Track",
                    "scoring_system": "ssvc",
                    "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-06-03T14:28:31Z/"
                }
            ],
            "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-995q-72cw-cfw3"
        }
    ],
    "weaknesses": [
        {
            "cwe_id": 601,
            "name": "URL Redirection to Untrusted Site ('Open Redirect')",
            "description": "A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks."
        }
    ],
    "exploits": [],
    "severity_range_score": "6.9 - 6.9",
    "exploitability": null,
    "weighted_severity": null,
    "risk_score": null,
    "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-7zbf-pw9h-1bc5"
}