High severity · published Feb 24, 2025
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
7.5
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
Passenger · Phusion
6.0.21 before 6.0.26 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-26803
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-26803
Vendor Advisory
https://blog.phusion.nl/2025/02/19/passenger-6-0-26/
Patch
https://github.com/phusion/passenger/commit/bb15591646687064ab2d578d5f9660b2a4168017
Patch
https://github.com/phusion/passenger/compare/release-6.0.25...release-6.0.26
Patch
https://github.com/phusion/passenger/releases/tag/release-6.0.26
Product
https://www.phusionpassenger.com/support
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