Relyra SAML SignatureValue not cryptographically verified -> authentication bypass_CVE-2026-49454

{
    "lastseen": "",
    "description": "Relyra is a strict-by-default SAML 2.0 Service Provider library for Elixir and Phoenix. Versions 1.0.0 and 1.1.0 accept forged SAML signatures because SignatureValue was not cryptographically verified before the library returned a successful authentication result. The XMLDSig trust boundary was incomplete as :public_key.verify over the exclusive-C14N canonicalized SignedInfo was not performed against the configured IdP certificate's public key, DigestValue was not recomputed over the canonicalized referenced element, and canonicalize/2 remained an unused passthrough in the signature-verification path. The result was a structure-only acceptance path where document shape and trust-source rejection could succeed without proving the signature bytes. A forged SignatureValue carrying an attacker-controlled NameID could be accepted as {:ok}. This issue has been fixed in version 1.2.0.",
    "published": "2026-06-18T20:52:22.605Z",
    "modified": "2026-06-18T20:52:22.605Z",
    "type": "cve",
    "title": "Relyra SAML SignatureValue not cryptographically verified -> authentication bypass",
    "source": "GitHub_M",
    "references": "https://github.com/szTheory/relyra/security/advisories/GHSA-jv46-xfwm-36j7\nhttps://github.com/szTheory/relyra/commit/2e456897af3158c175bb490ce7fc51d6241c8922\nhttps://github.com/szTheory/relyra/commit/8910200",
    "id": "CVE-2026-49454",
    "bulletinFamily": "",
    "cwe": [
        "CWE-287",
        "CWE-347"
    ],
    "cvelist": null,
    "sourceData": "szTheory relyra >= 1.0.0, < 1.2.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "relyra",
    "version": ">= 1.0.0, < 1.2.0",
    "vendor": "szTheory",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}