CVE-2026-46490
HIGHsamlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions
Title source: cnaExploitation Summary
EIP tracks 1 public exploit for CVE-2026-46490. PoCs published by BiiTts.
AI-analyzed exploit summary This repository contains a functional exploit PoC for CVE-2026-46490, demonstrating a SAML attribute injection vulnerability in samlify < 2.13.0. The exploit injects forged attributes (e.g., role=admin) into a signed SAML assertion by leveraging improper XML escaping in user-controlled input.
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.
Exploits (1)
This repository contains a functional exploit PoC for CVE-2026-46490, demonstrating a SAML attribute injection vulnerability in samlify < 2.13.0. The exploit injects forged attributes (e.g., role=admin) into a signed SAML assertion by leveraging improper XML escaping in user-controlled input.
References (1)
Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H