The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <= 1.16.0 does not properly verify the signature of the SAML Response. An unauthenticated attacker with access to any signed saml document (by the IdP) can thus forge a SAML Response/Assertion with arbitrary contents. This would allow the attacker to log in as arbitrary user within the vulnerable system. This vulnerability is fixed in 1.17.0 and 1.12.3.
CVE-2024-45409
CVSS base score
10.0 (v3.1)
Severity
CRITICAL
Attack vector
Network
Weakness
CWE-347
Last modified
November 4, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Affected products
onelogin ruby-saml
omniauth omniauth saml
gitlab gitlab
References
- github.com Patch
- github.com Patch
- github.com Vendor Advisory
- github.com Vendor Advisory
- lists.debian.org
- news.ycombinator.com
- security.netapp.com
- ssoready.com