CVE-2025-25293
CVSS v3
7.5
HIGH
EPSS Score
1.5 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Get an alert for each new CVE published for ruby-saml.
Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- gitlabBitnamiall versions · fixed in 17.9.2
- omniauth-samlRubyGemsall versions · fixed in 1.10.6
- ruby-samlRubyGemsfrom 1.13.0 · fixed in 1.18.0
Description
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 to decompress SAML responses in case they're compressed. It is possible to bypass the message size check with a compressed assertion since the message size is checked before inflation and not after. This issue may lead to remote Denial of Service (DoS). Versions 1.12.4 and 1.18.0 fix the issue.
Technical details
- Published
- 2025-03-12
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.