Command injection in HackerOne active-support ruby gem
Priority MEDIUM 51CWE-77Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-77.
Summary
active-support ruby gem 5.2.0 could allow a remote attacker to execute arbitrary code on the system, caused by containing a malicious backdoor. An attacker could exploit this vulnerability to execute arbitrary code on the system.
Why it matters now
EPSS 0.06477 93rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| HackerOne | active-support ruby gem | 5.2.0 | — | No fix listed | CNA |
| — | active-support (RubyGems) | all versions | — | No fix listed | GHSA-2j55-pcw5-x4h2 |
- active-support ruby gem VendorHackerOne Affected 5.2.0 Fixed in — No fix listed CNA
- active-support (RubyGems) Vendor— Affected all versions Fixed in — No fix listed GHSA-2j55-pcw5-x4h2
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:activesupport_project:activesupport:5.2.0:*:*:*:*:ruby:*:* | 5.2.0 | Vulnerable | Activesupport Project |
- cpe:2.3:a:activesupport_project:activesupport:5.2.0:*:*:*:*:ruby:*:* Versions 5.2.0 Vulnerable ·Activesupport Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-3779
- 2026-10-03 Alias added: GHSA-2j55-pcw5-x4h2
References
More Activesupport Project Activesupport vulnerabilities
- TI-2023-08968 Uncontrolled resource consumption in https://github.com/rails/rails CVSS 3.1HIGH 7.5
Sources
- CVE-2018-3779 · CVE Program
- CVE-2018-3779 · NVD
- FIRST EPSS
- GHSA-2j55-pcw5-x4h2 · GitHub Advisory Database · CC BY 4.0
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