CVE-2026-49454

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Source

https://cve.org/CVERecord?id=CVE-2026-49454

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49454.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-49454

Aliases

GHSA-jv46-xfwm-36j7

Published

2026-06-18T20:52:22.605Z

Modified

2026-07-08T08:13:40.466039131Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator

Summary

Relyra SAML SignatureValue not cryptographically verified -> authentication bypass

Details

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.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49454.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-287",
        "CWE-347"
    ]
}

References

Affected packages

Git / github.com/sztheory/relyra

Affected ranges

Type

GIT

Repo

https://github.com/sztheory/relyra

Events

Introduced

Fixed

2e456897af3158c175bb490ce7fc51d6241c8922

Fixed

8910200

Database specific

{
    "extracted_events": [
        {
            "introduced": "1.0.0"
        },
        {
            "fixed": "1.2.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*

v0.1

v1.*

v1.0

v1.1.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49454.json"