Out-of-bounds Read in Ruby Json
CVE-2025-27788
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. V…
Vulnerability class: Buffer Overflow
EPSS: 0.002 (37.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Ruby Json — versions >= 2.10.0, < 2.10.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/ruby/json/security/advisories/GHSA-9m3q-rhmv-5q44 (x_refsource_CONFIRM)
- https://github.com/ruby/json/commit/c56db31f800d5d508389793e69682f99749dbadf (x_refsource_MISC)
- https://github.com/ruby/json/releases/tag/v2.10.2 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-27788?
- CVE-2025-27788 is a high-severity vulnerability in Ruby Json, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2025-03-12.
- How severe is CVE-2025-27788?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-27788 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.