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Vulnerability record · CVE-2024-45409 · published 10 September 2024

CVE-2024-45409: Onelogin ruby-saml improper verification of cryptographic signature vulnerability

Onelogin · Ruby Saml

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.

9.8 CVSS 3.1 Critical EPSS 11% · top 4.3% CWE-347 · Improper verification of cryptographic signature
9.8CVSS 3.1 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/SAML-Toolkits/ruby-saml/commit/1ec5392bc506fe43a02dbb66b68741051c5ffeae Patch
https://github.com/SAML-Toolkits/ruby-saml/commit/4865d030cae9705ee5cdb12415c654c634093ae7 Patch
https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-jw9c-mfg7-9rx2 Vendor Advisory
https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-cvp8-5r8g-fhvq Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/11/msg00006.html
https://news.ycombinator.com/item?id=41586031
https://security.netapp.com/advisory/ntap-20240926-0008/
https://ssoready.com/blog/engineering/ruby-saml-pwned-by-xml-signature-wrapping-attacks/

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Source: NIST National Vulnerability Database (record CVE-2024-45409), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.