CVE-2025-27788

Ruby JSON Parser has Out-of-bounds Read

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.11%
Third-Party Advisory github.com
Affected: ruby json
Published at:
Updated at:

References

Link Tags
https://github.com/ruby/json/security/advisories/GHSA-9m3q-rhmv-5q44 third party advisory
https://github.com/ruby/json/commit/c56db31f800d5d508389793e69682f99749dbadf patch
https://github.com/ruby/json/releases/tag/v2.10.2 release notes

Frequently Asked Questions

What is the severity of CVE-2025-27788?
CVE-2025-27788 has been scored as a high severity vulnerability.
How to fix CVE-2025-27788?
To fix CVE-2025-27788, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-27788 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-27788 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-27788?
CVE-2025-27788 affects ruby json.
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