Phusion Passenger vulnerabilities

CVE-2025-26803 [HIGH] CWE-908 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 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.

CVE-2012-6135 [HIGH] CWE-20 CVE-2012-6135: RubyGems passenger 4.0.0 betas 1 and 2 allows remote attackers to delete arbitrary files during the RubyGems passenger 4.0.0 betas 1 and 2 allows remote attackers to delete arbitrary files during the startup process.

CVE-2015-7519 [LOW] CWE-20 Phusion Passenger allows remote attackers to spoof headers Phusion Passenger allows remote attackers to spoof headers `agent/Core/Controller/SendRequest.cpp` in Phusion Passenger before 4.0.60 and 5.0.x before 5.0.22, when used in Apache integration mode or in standalone mode without a filtering proxy, allows remote attackers to spoof headers passed to applications by using an `_` (underscore) character instead of a `-` (dash) character in an HTTP header, as demonstra

CVE-2018-12615 [MEDIUM] CWE-732 CVE-2018-12615: An issue was discovered in switchGroup() in agent/ExecHelper/ExecHelperMain.cpp in Phusion Passenger An issue was discovered in switchGroup() in agent/ExecHelper/ExecHelperMain.cpp in Phusion Passenger before 5.3.2. The set of groups (gidset) is not set correctly, leaving it up to randomness (i.e., uninitialized memory) which supplementary groups are actually being set while lowering privileges.

CVE-2018-12026 [CRITICAL] CWE-59 CVE-2018-12026: During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5 During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows such applications to replace key files or directories in the spawning communication directory with symlinks. This then could result in arbitrary reads and writes, which in turn can result in information disclosure and privile

CVE-2018-12028 [HIGH] CWE-732 CVE-2018-12028: An Incorrect Access Control vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 all An Incorrect Access Control vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows a Passenger-managed malicious application, upon spawning a child process, to report an arbitrary different PID back to Passenger's process manager. If the malicious application then generates an error, it would cause Passenger's process manager to k

CVE-2018-12029 [HIGH] CWE-362 CVE-2018-12029: A race condition in the nginx module in Phusion Passenger 3.x through 5.x before 5.3.2 allows local A race condition in the nginx module in Phusion Passenger 3.x through 5.x before 5.3.2 allows local escalation of privileges when a non-standard passenger_instance_registry_dir with insufficiently strict permissions is configured. Replacing a file with a symlink after the file was created, but before it was chowned, leads to the target of the link bein

CVE-2018-12027 [HIGH] CWE-200 CVE-2018-12027: An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 causes An Insecure Permissions vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 causes information disclosure in the following situation: given a Passenger-spawned application process that reports that it listens on a certain Unix domain socket, if any of the parent directories of said socket are writable by a normal user that is not the a

CVE-2017-16355 [MEDIUM] CWE-200 CVE-2017-16355: In agent/Core/SpawningKit/Spawner.h in Phusion Passenger 5.1.10 (fixed in Passenger Open Source 5.1. In agent/Core/SpawningKit/Spawner.h in Phusion Passenger 5.1.10 (fixed in Passenger Open Source 5.1.11 and Passenger Enterprise 5.1.10), if Passenger is running as root, it is possible to list the contents of arbitrary files on a system by symlinking a file named REVISION from the application root folder to a file of choice and querying passenger-st

CVE-2016-10345 [HIGH] CWE-264 CVE-2016-10345: In Phusion Passenger before 5.1.0, a known /tmp filename was used during passenger-install-nginx-mod In Phusion Passenger before 5.1.0, a known /tmp filename was used during passenger-install-nginx-module execution, which could allow local attackers to gain the privileges of the passenger user.

CVE-2014-1831 [LOW] CVE-2014-1831: Phusion Passenger before 4.0.37 allows local users to write to certain files and directories via a s Phusion Passenger before 4.0.37 allows local users to write to certain files and directories via a symlink attack on (1) control_process.pid or a (2) generation-* file.

CVE-2014-1832 [LOW] CVE-2014-1832: Phusion Passenger 4.0.37 allows local users to write to certain files and directories via a symlink Phusion Passenger 4.0.37 allows local users to write to certain files and directories via a symlink attack on (1) control_process.pid or a (2) generation-* file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-1831.

CVE-2013-2119 [MEDIUM] CWE-264 CVE-2013-2119: Phusion Passenger gem before 3.0.21 and 4.0.x before 4.0.5 for Ruby allows local users to cause a de Phusion Passenger gem before 3.0.21 and 4.0.x before 4.0.5 for Ruby allows local users to cause a denial of service (prevent application start) or gain privileges by pre-creating a temporary "config" file in a directory with a predictable name in /tmp/ before it is used by the gem.

CVE-2013-4136 [MEDIUM] CWE-59 CVE-2013-4136: ext/common/ServerInstanceDir.h in Phusion Passenger gem before 4.0.6 for Ruby allows local users to ext/common/ServerInstanceDir.h in Phusion Passenger gem before 4.0.6 for Ruby allows local users to gain privileges or possibly change the ownership of arbitrary directories via a symlink attack on a directory with a predictable name in /tmp/.