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
Published
2026-06-18T20:52:22Z
Modified
2026-10-28T02:30:30Z
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 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-287",
        "CWE-347"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49454.json"
}
References

Affected packages

Git / github.com/sztheory/relyra

Affected ranges

Type
GIT
Repo
https://github.com/sztheory/relyra
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
09bd64728befb55f2c35dd272fb644e3cbe77e54
Fixed
2e456897af3158c175bb490ce7fc51d6241c8922
Fixed
8910200
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.0.0"
                },
                {
                    "fixed":  "1.2.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "2e456897af3158c175bb490ce7fc51d6241c8922"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "8910200"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

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"