CVE-2025-54572 — Ruby SAML DOS vulnerability with large SAML response
The Ruby SAML library is for implementing the client side of a SAML authorization. In versions 1.18.0 and below, a denial-of-service vulnerability exists in ruby-saml even with …
Published: 2025-07-30 · CVSS: 6.9 · CVSS 4.0
The Ruby SAML library is for implementing the client side of a SAML authorization. In versions 1.18.0 and below, a denial-of-service vulnerability exists in ruby-saml even with the message_max_bytesize setting configured. The vulnerability occurs because the SAML response is validated for Base64 format prior to checking the message size, leading to potential resource exhaustion. This is fixed in version 1.18.1.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7