CVE-2025-26803

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
mitreCNA
5.3 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA-ADPADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 42%
VendorProductVersion
phusionpassenger
6.0.21 ≤
𝑥
< 6.0.26
𝑥
= Vulnerable software versions
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
passenger
plucky
needed
oracular
not-affected
noble
not-affected
jammy
not-affected
focal
not-affected
bionic
not-affected
xenial
not-affected
Common Weakness Enumeration
References
https://blog.phusion.nl/2025/02/19/passenger-6-0-26/
https://github.com/phusion/passenger/commit/bb15591646687064ab2d578d5f9660b2a4168017
https://github.com/phusion/passenger/compare/release-6.0.25...release-6.0.26
https://github.com/phusion/passenger/releases/tag/release-6.0.26
https://www.phusionpassenger.com/support