CVE-2025-27788: Out-of-bounds Read in Ruby JSON Parser

CVE-2025-27788 · Severity: low · CVSS 3.1 · Published 2025-03-12

Out-of-bounds Read in Ruby JSON Parser

Technologies: json (RubyGems). Vendors: RubyGems.

Quick answers

Is CVE-2025-27788 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-27788 being exploited in the wild.
How severe is CVE-2025-27788?
Low severity, with a CVSS score of 3.1, published 12 March 2025.
Which products and versions are affected?
json (RubyGems) ECOSYSTEM:introduced=2.10.0,fixed=2.10.2.
Is there a fix for CVE-2025-27788?
Yes. json (RubyGems): upgrade to 2.10.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-27788?
Check whether you run json (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • json (RubyGems): upgrade to 2.10.2 or later
    bundle update json

Affected products

  • json (RubyGems) ECOSYSTEM:introduced=2.10.0,fixed=2.10.2

Identifiers

  • CVE-2025-27788
  • GHSA-9m3q-rhmv-5q44

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