CVE-2025-54369

Node-SAML SAML Authentication Bypass

State: Published
Severity: 9.3 Critical
Published: Dec 12, 2025
Updated: May 7, 2026
Reserved: Jul 21, 2025

Description

Node-SAML is a SAML library not dependent on any frameworks that runs in Node. In versions 5.0.1 and below, Node-SAML loads the assertion from the (unsigned) original response document. This is different than the parts that are verified when checking signature. This allows an attacker to modify authentication details within a valid SAML assertion. For example, in one attack it is possible to remove any character from the SAML assertion username. This issue is fixed in version 5.1.0.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-87 Improper Neutralization of Alternate XSS Syntax
CWE-347 Improper Verification of Cryptographic Signature

Affected Products

Product	Versions
node-samlnode-saml	< 5.1.0Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.