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TI-2025-20568 Aliases CVE-2025-27788GHSA-9m3q-rhmv-5q44

Ruby JSON Parser has Out-of-bounds Read

Priority MEDIUM 40CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-125 and the CVSS impact.

Summary

JSON is a JSON implementation for Ruby. Starting in version 2.10.0 and prior to version 2.10.2, a specially crafted document could cause an out of bound read, most likely resulting in a crash. Versions prior to 2.10.0 are not vulnerable. Version 2.10.2 fixes the problem. No known workarounds are available.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0072 54th percentileScored 2026-11-08
Fix Fixed json (ruby): 2.10.2json (RubyGems): 2.10.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
rubyjson2.10.0 to before 2.10.22.10.2Patch availableCNA
—json (RubyGems)2.10.0 to before 2.10.22.10.2Patch availableGHSA-9m3q-rhmv-5q44
  • json Vendorruby Affected 2.10.0 to before 2.10.2 Fixed in 2.10.2 Patch available CNA
  • json (RubyGems) Vendor— Affected 2.10.0 to before 2.10.2 Fixed in 2.10.2 Patch available GHSA-9m3q-rhmv-5q44

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ruby-lang:javascript_object_notation:*:*:*:*:*:ruby:*:*2.10.0 to before 2.10.2Vulnerableruby
  • cpe:2.3:a:ruby-lang:javascript_object_notation:*:*:*:*:*:ruby:*:* Versions 2.10.0 to before 2.10.2 Vulnerable ·ruby

Remediation

  • Fix · CNA json (ruby) Fixed in 2.10.2
  • Fix · GHSA-9m3q-rhmv-5q44 json (RubyGems) Fixed in 2.10.2 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 3 products
  • Red Hat 3scale API Management Platform 2
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux AI (RHEL AI)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-27788
  2. 2026-10-03 Alias added: GHSA-9m3q-rhmv-5q44

References

Patch 1

Advisory 2

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences