An Incorrect Access Control vulnerability in SpawningKit in Phusion Passenger 5.3.x…
Priority LOW 36CWE-732Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub.
Summary
An Incorrect Access Control vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows a Passenger-managed malicious application, upon spawning a child process, to report an arbitrary different PID back to Passenger's process manager. If the malicious application then generates an error, it would cause Passenger's process manager to kill said reported arbitrary PID.
Why it matters now
EPSS 0.00886 59th percentileScored 2026-11-07
Fix Fixed passenger (RubyGems): 5.3.2
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | passenger (RubyGems) | 5.3.0 to before 5.3.2 | 5.3.2 | Patch available | GHSA-jjhj-8gx7-x836 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- passenger (RubyGems) Vendor— Affected 5.3.0 to before 5.3.2 Fixed in 5.3.2 Patch available GHSA-jjhj-8gx7-x836
Remediation
- Fix · GHSA-jjhj-8gx7-x836 passenger (RubyGems) Fixed in 5.3.2 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 3 products
- Red Hat Ceph Storage 1.3
- Red Hat Satellite 6
- Red Hat Update Infrastructure 3 for Cloud Providers
Timeline
- 2026-10-02 Threatist record created from CVE-2018-12028
- 2026-10-03 Alias added: GHSA-jjhj-8gx7-x836
References
Advisory 3
More Phusion Passenger vulnerabilities
- TI-2018-08619 During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion… CVSS 3.0CRITICAL 9.8
- TI-2025-19710 Use of uninitialized resource in Phusion Passenger CVSS 3.1HIGH 7.5
- TI-2018-08620 An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before… CVSS 3.0HIGH 8.8
- TI-2012-05097 RubyGems passenger 4.0.0 betas 1 and 2 allows remote attackers to delete arbitrary files during the startup process. CVSS 3.1HIGH 7.5
- TI-2016-08407 In Phusion Passenger before 5.1.0, a known /tmp filename was used during… CVSS 3.0HIGH 7.8
- TI-2018-08622 A race condition in the nginx module in Phusion Passenger 3.x through 5.x before 5.3.2… CVSS 3.0HIGH 7.0
Sources
- CVE-2018-12028 · CVE Program
- CVE-2018-12028 · NVD
- FIRST EPSS
- GHSA-jjhj-8gx7-x836 · GitHub Advisory Database · CC BY 4.0
- CVE-2018-12028 · Red Hat security data · CC BY 4.0
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