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CVE-2026-33176

7.5 · HIGH

Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework.

Published Mar 24, 2026CWE-400EPSS 0.84%

Overview

CVE-2026-33176 is a high-severity vulnerability. It was published on March 24, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Support number helpers accept strings containing scientific notation (e.g. `1e10000`), which `BigDecimal` expands into extremely large decimal representations. This can cause excessive memory allocation and CPU consumption when the expanded number is formatted, possibly resulting in a DoS vulnerability. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcbGitHubgithub.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1aGitHubgithub.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856GitHubgithub.com/rails/rails/releases/tag/v7.2.3.1GitHubgithub.com/rails/rails/releases/tag/v8.0.4.1GitHubgithub.com/rails/rails/releases/tag/v8.1.2.1GitHubgithub.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-33176?

CVE-2026-33176 is a high-severity vulnerability. It was published on March 24, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-33176?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-33176?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-33176?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-33176 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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