Vulnerability · Published Feb 24, 2025 · Assigned by mitre
CVE-2025-26803
Medium 5.3
In plain English
A medium-severity security flaw in Passenger from Phusion. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.6%top 50.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | passenger | 6.0.26+ds-1 | DEBIAN-CVE-2025-26803 |
| Debian:14 | passenger | 6.0.26+ds-1 | DEBIAN-CVE-2025-26803 |
| RubyGems | passenger | 6.0.26 | GHSA-2cj2-qqxj-5m3r |
| Ubuntu:25.10 | passenger | no fix listed | UBUNTU-CVE-2025-26803 |
| Ubuntu:26.04:LTS | passenger | no fix listed | UBUNTU-CVE-2025-26803 |
| Ubuntu:26.10 | passenger | no fix listed | UBUNTU-CVE-2025-26803 |
Affected products (as reported)
Weakness: CWE-908 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://www.phusionpassenger.com/support
- 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://blog.phusion.nl/2025/02/19/passenger-6-0-26/
- https://github.com/phusion/passenger/commit/bb15591646687064ab2d578d5f9660b2a4168017