CVE-2025-26803
HIGHCVSS 7.5/10EPSS 0.57%
Last modified
CVE-2025-26803 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Phusion | Passenger | >= 6.0.21, < 6.0.26 |
References
- https://blog.phusion.nl/2025/02/19/passenger-6-0-26/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is 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.
How severe is CVE-2025-26803?
CVE-2025-26803 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.
How do I fix CVE-2025-26803?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2025-26803?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST