MEDIUM5.3

GHSA-2cj2-qqxj-5m3r

Phusion Passenger denial of service

Quick fix

GHSA-2cj2-qqxj-5m3r — passenger: upgrade to the fixed version with the command below.

bundle update passenger

Details

The http parser in Phusion Passenger 6.0.21 through 6.0.25 before 6.0.26 allows a denial of service during parsing of a request with an invalid HTTP method.

Are you affected?

Enter the version of the package you're using.

Affected packages

RubyGems/passenger

Introduced in: 6.0.21Fixed in: 6.0.26

Fixbundle update passenger

References

https://nvd.nist.gov/vuln/detail/CVE-2025-26803[ADVISORY]
https://github.com/phusion/passenger/commit/bb15591646687064ab2d578d5f9660b2a4168017[WEB]
https://blog.phusion.nl/2025/02/19/passenger-6-0-26[WEB]
https://github.com/phusion/passenger[PACKAGE]
https://github.com/phusion/passenger/compare/release-6.0.25...release-6.0.26[WEB]
https://github.com/phusion/passenger/releases/tag/release-6.0.26[WEB]
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2025-26803.yml[WEB]
https://www.phusionpassenger.com/support[WEB]