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CVE-2025-27788— Ruby JSON Parser has Out-of-bounds Read

Quick assessment

Affected
ruby json
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ruby是松本行弘（Yukihiro Matsumoto）个人开发者的一种跨平台、面向对象的动态类型编程语言。 Ruby 2.10.0版本至2.10.2之前版本存在缓冲区错误漏洞，该漏洞源于特制文档可能导致越界读取，从而导致崩溃。

CVSS 7.5 · High EPSS 0.71% · P52

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-27788

Vulnerability Information
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Vulnerability Title
Ruby JSON Parser has Out-of-bounds Read
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Ruby 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ruby是松本行弘（Yukihiro Matsumoto）个人开发者的一种跨平台、面向对象的动态类型编程语言。 Ruby 2.10.0版本至2.10.2之前版本存在缓冲区错误漏洞，该漏洞源于特制文档可能导致越界读取，从而导致崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ruby json >= 2.10.0, < 2.10.2 -

II. Public POCs for CVE-2025-27788

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5969 chars
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III. Intelligence Information for CVE-2025-27788

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Patches & Fixes for CVE-2025-27788 (1)

Vendor Advisories for CVE-2025-27788 (1)

Other References for CVE-2025-27788 (1)

IV. Related Vulnerabilities

Same product: json
Same vendor: ruby
Same weakness: CWE-125

V. Comments for CVE-2025-27788

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