CVE-2026-49454— Relyra SAML认证绕过漏洞
可能的 ATT&CK 技术 1AI
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一、 漏洞 CVE-2026-49454 基础信息
漏洞信息
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Vulnerability Title
Relyra SAML SignatureValue not cryptographically verified -> authentication bypass
来源: 美国国家漏洞数据库 NVD
Vulnerability 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.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
认证机制不恰当
来源: 美国国家漏洞数据库 NVD
受影响产品
二、漏洞 CVE-2026-49454 的公开POC
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CVE-2026-49454 补丁与修复 (2)
CVE-2026-49454 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-49454
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