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CVE-2025-25293 — Vulnerability in ruby-saml — CVE Details

HIGH

Ruby SAML allows remote Denial of Service (DoS) with compressed SAML responses

Published March 12, 2025Updated February 4, 2026Source: osv

Summary

### Summary 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. ### Impact This issue may lead to remote Denial of Service (DoS).

Advisory Timeline

  • First published March 12, 2025 (579 days ago).
  • Last revised February 4, 2026 — 328 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update ruby-saml to 1.18.0 or later
gem install ruby-saml -v 1.18.0
Bundler
Update ruby-saml to 1.12.4 or later
gem install ruby-saml -v 1.12.4

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
ruby-saml
rubygems
1.13.0, 1.14.0, 1.15.0, 1.16.0 (+1 more)1.18.0
ruby-saml
rubygems
0.0.5, 0.0.6, 0.0.7, 0.0.8 (+77 more)1.12.4

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-400
    Uncontrolled Resource ConsumptionMITRE
  • CWE-770
    Allocation of Resources Without LimitsMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

References

Frequently Asked Questions

What is CVE-2025-25293?
Ruby SAML allows remote Denial of Service (DoS) with compressed SAML responses This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2025-25293?
CVE-2025-25293 affects ruby-saml. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-25293 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-92rq-c8cf-prrq
BIT-gitlab-2025-25293

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