CVE-2026-46490CWE-91

samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions

High · published June 8, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
46.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
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
EPSS
0.00565 · 46.2th percentile
Weakness
CWE-91 · XML Injection (aka Blind XPath Injection)
Published
2026-06-08T18:41Z
EPSS history
Timeline
  • 08 JUN 18:41Z
    samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions
    cvelistv5