CVE-2025-27788
CVE-2025-27788 is a high-severity vulnerability in Ruby-lang Javascript Object Notation with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 1% (47th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-7805
- Weakness: CWE-125
- Affected product: Ruby-lang Javascript Object Notation
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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. Version 2.10.2 fixes the problem. No known workarounds are available.
- How severe is CVE-2025-27788?
- CVE-2025-27788 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2025-27788 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-27788?
- CVE-2025-27788 affects Ruby-lang Javascript Object Notation. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-27788?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-27788 have an EU (EUVD) identifier?
- Yes. CVE-2025-27788 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7805.
- When was CVE-2025-27788 published?
- CVE-2025-27788 was published on 2025-03-12 and last updated on 2026-06-17.
References
- https://github.com/ruby/json/commit/c56db31f800d5d508389793e69682f99749dbadf
- https://github.com/ruby/json/releases/tag/v2.10.2
- https://github.com/ruby/json/security/advisories/GHSA-9m3q-rhmv-5q44
Affected products (1)
- cpe:2.3:a:ruby-lang:javascript_object_notation:*:*:*:*:*:ruby:*:*
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