CVE-2026-33176

MEDIUM EPSS 44.7%
Published Mar 24, 20263mo ago · Modified Jun 17, 20262w ago
6.6 CVSS 4.0
Medium
Find Similar
Published Mar 24, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
6.6
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
44.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-400 Uncontrolled Resource Consumption Resource Mgmt
CWE-770

Affected Products 3

VendorProductVersionRange
rubyonrailsrails* <7.2.3.1
rubyonrailsrails*≥8.0.0  –  <8.0.4.1
rubyonrailsrails*≥8.1.0  –  <8.1.2.1

References 7

  • github.com https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb
    Patch
  • github.com https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a
    Patch
  • github.com https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856
    Patch
  • github.com https://github.com/rails/rails/releases/tag/v7.2.3.1
    Release Notes
  • github.com https://github.com/rails/rails/releases/tag/v8.0.4.1
    Release Notes
  • github.com https://github.com/rails/rails/releases/tag/v8.1.2.1
    Release Notes
  • github.com https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9
    Vendor Advisory

Remediation

  • github.com https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb
    Patch
  • github.com https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a
    Patch
  • github.com https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856
    Patch