tngan samlify up to 2.12.x xml injection

Summaryinfo

A vulnerability classified as critical was found in tngan samlify up to 2.12.x. Affected by this vulnerability is an unknown functionality. Executing a manipulation can lead to xml injection. This vulnerability is tracked as CVE-2026-46490. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in tngan samlify up to 2.12.x and classified as critical. This vulnerability affects an unknown function. The manipulation with an unknown input leads to a xml injection vulnerability. The CWE definition for the vulnerability is CWE-91. The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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., ) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new 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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-46490 since 05/14/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1505.

Upgrading to version 2.13.0 eliminates this vulnerability.

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Productinfo

Vendor

• tngan

Name

• samlify

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12

Website

• Product: https://github.com/tngan/samlify/

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