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CVE-2026-46490— samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions

Quick assessment

Affected
tngan samlify
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

samlify是tngan个人开发者的一个用于 SAML SSO 的 Node.js 库。 samlify 2.13.0之前版本存在安全漏洞，该漏洞源于模板替换仅转义属性上下文，元素文本中的值未转义，可能导致XML注入和权限提升。

AI Predicted 8.1 Difficulty: Easy EPSS 0.56% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
tngan samlify < 2.13.0 affected
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I. Basic Information for CVE-2026-46490

Vulnerability Information
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Vulnerability Title
samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions
Source: CVE Program / CVE List V5
Vulnerability Description
samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify’s template substitution only escapes attribute contexts. Values inserted into element text (e.g., <saml:AttributeValue>) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new <saml:Attribute> elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML注入(XPath盲注)
Source: CVE Program / CVE List V5
Vulnerability Title
samlify 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
samlify是tngan个人开发者的一个用于 SAML SSO 的 Node.js 库。 samlify 2.13.0之前版本存在安全漏洞，该漏洞源于模板替换仅转义属性上下文，元素文本中的值未转义，可能导致XML注入和权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tngan samlify < 2.13.0 -

II. Public POCs for CVE-2026-46490

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III. Intelligence Information for CVE-2026-46490

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Vendor Advisories for CVE-2026-46490 (1)

IV. Related Vulnerabilities

Same product: samlify
Same vendor: tngan
Same weakness: CWE-91

V. Comments for CVE-2026-46490

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