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CVE-2025-27788 — Out-of-bounds Read in json — CVE Details

HIGH

Out-of-bounds Read in Ruby JSON Parser

Published March 12, 2025Updated September 10, 2026Source: osv

Summary

### Impact A specially crafted document could cause an out of bound read, most likely resulting in a crash. Versions 2.10.0 and 2.10.1 are impacted. Older versions are not. ### Patches Version 2.10.2 fixes the problem. ### Workarounds None.

Advisory Timeline

  • First published March 12, 2025 (579 days ago).
  • Last revised September 10, 2026 — 547 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update json to 2.10.2 or later
gem install json -v 2.10.2

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

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
json
rubygems
2.10.0, 2.10.12.10.2

Vulnerability Classification

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

  • CWE-125
    Out-of-bounds ReadMITRE

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-2025-27788?
Out-of-bounds Read in Ruby JSON Parser 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-2025-27788?
CVE-2025-27788 affects json. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-27788 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-9m3q-rhmv-5q44

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