GHSA-2cj2-qqxj-5m3r

Phusion Passenger denial of service

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-26803

Packages

Ecosystem	Package	Affected	Fixed in
RubyGems	passenger	>= 6.0.21, < 6.0.26	6.0.26

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.

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