Input validation error in Phusion Passenger - CVE-2025-26803

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Main Vulnerability Database Vulnerabilities #VU104968

Input validation error in Phusion Passenger - CVE-2025-26803

Published: February 27, 2025


Vulnerability identifier: #VU104968
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-26803
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when parsing HTTP requests with invalid HTTP method. A remote attacker can send a specially crafted HTTP request to the application and perform a denial of service (DoS) attack.


Affected software

Phusion Passenger
EasyApache

How to mitigate CVE-2025-26803

Install updates from vendor's website.

Phusion Passenger - update to 6.0.26
EasyApache - update to 4 25-7

External References

Related Security Bulletins