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TI-2018-08619 Aliases CVE-2018-12026GHSA-7cv3-gvmc-8mq5

During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion…

Priority MEDIUM 46CWE-59Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
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

During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows such applications to replace key files or directories in the spawning communication directory with symlinks. This then could result in arbitrary reads and writes, which in turn can result in information disclosure and privilege escalation.

Why it matters now

EPSS 0.01918 80th 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

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—passenger (RubyGems)5.3.0 to before 5.3.25.3.2Patch availableGHSA-7cv3-gvmc-8mq5
  • — 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-7cv3-gvmc-8mq5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:phusion:passenger:*:*:*:*:*:*:*:*5.3.0 to before 5.3.2VulnerablePhusion
  • cpe:2.3:a:phusion:passenger:*:*:*:*:*:*:*:* Versions 5.3.0 to before 5.3.2 Vulnerable ·Phusion

Remediation

  • Fix · GHSA-7cv3-gvmc-8mq5 passenger (RubyGems) Fixed in 5.3.2 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. 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

  1. 2026-10-02 Threatist record created from CVE-2018-12026
  2. 2026-10-03 Alias added: GHSA-7cv3-gvmc-8mq5

References

Advisory 3

Other 4

  • 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-2018-08621 An Incorrect Access Control vulnerability in SpawningKit in Phusion Passenger 5.3.x… CVSS 3.0HIGH 7.8
  • 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
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences