CVE-2025-27788

Ruby JSON Parser has Out-of-bounds Read

HIGH
7.5
CVSS Score
Published: March 12, 2025 at 01:51 PM UTC
Updated: June 17, 2026 at 09:04 AM UTC
2 products affected across 2 vendorsJavaScript Object NotationJSON

Using json by ruby?

Get instant alerts when new vulnerabilities affect json - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.5
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.10.0 ≤ v < 2.10.2
Affected range stops below 2.10.2, so it looks safe — our inference, not a vendor statement
v < 2.10.2
Affected range stops below 2.10.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card