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CVE-2025-27788

23
FAUCET Score

CVE-2025-27788 is an out-of-bounds read vulnerability affecting the Ruby JSON implementation (ruby_lang javascript_object_notation) in versions 2.10.0 and 2.10.1. A specially crafted JSON document can trigger this flaw, likely leading to a denial of service through application crashes. Rated with a CVSS score of 7.5 (HIGH), this vulnerability is remotely exploitable with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.10.0 , < 2.10.2CPE matchmatch criteria
cpe:2.3:a:ruby-lang:javascript_object_notation:*:*:*:*:*:ruby:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.66%
Probability of exploitation in next 30 days
EPSS Percentile
48.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0066 is in the 24th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: jsonFixed in: 2.10.2

Vendor Advisories (2)

rubygemsGHSA-9m3q-rhmv-5q44high

Out-of-bounds Read in Ruby JSON Parser

Mar 12, 2025
redhatCVE-2025-27788Important

json: Ruby JSON Parser has Out-of-bounds Read

Mar 12, 2025

References

github.com / ruby/json/commit/c56db31f800d5d508389793e69682f99749dbadf
Patch
github.com / ruby/json/releases/tag/v2.10.2
Release Notes
github.com / ruby/json/security/advisories/GHSA-9m3q-rhmv-5q44
Third Party Advisory