# CVE-2025-26803: Phusion Passenger denial of service

Source: https://junglewise.ai/threats/cve-2025-26803-phusion-passenger-denial-of-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-02-24  
License: CC BY 4.0 with a link back

CVE-2025-26803 · Severity: low · CVSS 3.1 · Published 2025-02-24

Phusion Passenger denial of service

Technologies: [passenger (RubyGems)](https://junglewise.ai/threats/technologies/passenger). Vendors: [RubyGems](https://junglewise.ai/threats/vendors/rubygems).

## Quick answers

**Is CVE-2025-26803 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-26803 being exploited in the wild.

**How severe is CVE-2025-26803?** Low severity, with a CVSS score of 3.1, published 24 February 2025.

**Which products and versions are affected?** passenger (RubyGems) ECOSYSTEM:introduced=6.0.21,fixed=6.0.26.

**Is there a fix for CVE-2025-26803?** Yes. passenger (RubyGems): upgrade to 6.0.26 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-26803?** Check whether you run passenger (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- passenger (RubyGems): upgrade to 6.0.26 or later

  ```sh
  bundle update passenger
  ```


## Affected products

- passenger (RubyGems) ECOSYSTEM:introduced=6.0.21,fixed=6.0.26

## Identifiers

- CVE-2025-26803
- GHSA-2cj2-qqxj-5m3r

## Related threats

- [Phusion Passenger Race Condition Allows Privilege Escalation](https://junglewise.ai/threats/cve-2018-12029-phusion-passenger-race-condition-allows-privilege-escalation)
- [Phusion Passenger SpawningKit Contains Arbitrary Read/Write Vulnerability](https://junglewise.ai/threats/cve-2018-12026-phusion-passenger-spawningkit-contains-arbitrary-read-write)
- [Phusion Passenger incorrect permission assignment](https://junglewise.ai/threats/cve-2018-12615-phusion-passenger-incorrect-permission-assignment)
- [Incorrect Access Control in Phusion Passenger](https://junglewise.ai/threats/cve-2018-12028-incorrect-access-control-in-phusion-passenger)
- [Insecure Permissions in Phusion Passenger](https://junglewise.ai/threats/cve-2018-12027-insecure-permissions-in-phusion-passenger)