Resource exhaustion in Saml-toolkits Ruby-saml
CVE-2025-25293
ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Prior to versions 1.12.4 and 1.18.0, ruby-saml is susceptible to remote Denial of Service (DoS) with compressed SAML responses. ruby-saml uses zlib…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.014 (68.0th percentile) — read the EPSS interpretation.
Affected products
- Saml-toolkits Ruby-saml — versions < 1.12.4, >= 1.13.0, < 1.18.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq (x_refsource_CONFIRM)
- https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv (x_refsource_MISC)
- https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a (x_refsource_MISC)
- https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1 (x_refsource_MISC)
- https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released (x_refsource_MISC)
- https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials (x_refsource_MISC)
- https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4 (x_refsource_MISC)
- https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0 (x_refsource_MISC)
- https://securitylab.github.com/advisories/GHSL-2024-355_ruby-saml (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-25293?
- CVE-2025-25293 is a vulnerability in Saml-toolkits Ruby-saml, classified under Uncontrolled Resource Consumption. Published 2025-03-12.
- Is CVE-2025-25293 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.