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… (CVE-2025-26803)
Phusion Passenger versions 6.0.21 through 6.0.25 contain a vulnerability in the HTTP parser that allows denial of service when processing requests with invalid HTTP methods. This issue is resolved in version 6.0.26.
AI Analysis
Technical Summary
The HTTP parser component in Phusion Passenger versions >=6.0.21 and <6.0.26 improperly handles requests containing invalid HTTP methods, which can cause a denial of service condition during request parsing. This vulnerability was addressed and fixed in version 6.0.26, as documented in the official GitHub release and commit history.
Potential Impact
An attacker can send specially crafted HTTP requests with invalid methods to cause the Phusion Passenger server to become unresponsive or crash, resulting in denial of service. There is no indication of code execution or data compromise from this vulnerability.
Mitigation Recommendations
Upgrade Phusion Passenger to version 6.0.26 or later, where this vulnerability has been fixed. The vendor has released an official patch, and applying this update fully mitigates the issue.
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… (CVE-2025-26803)
Description
Phusion Passenger versions 6.0.21 through 6.0.25 contain a vulnerability in the HTTP parser that allows denial of service when processing requests with invalid HTTP methods. This issue is resolved in version 6.0.26.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The HTTP parser component in Phusion Passenger versions >=6.0.21 and <6.0.26 improperly handles requests containing invalid HTTP methods, which can cause a denial of service condition during request parsing. This vulnerability was addressed and fixed in version 6.0.26, as documented in the official GitHub release and commit history.
Potential Impact
An attacker can send specially crafted HTTP requests with invalid methods to cause the Phusion Passenger server to become unresponsive or crash, resulting in denial of service. There is no indication of code execution or data compromise from this vulnerability.
Mitigation Recommendations
Upgrade Phusion Passenger to version 6.0.26 or later, where this vulnerability has been fixed. The vendor has released an official patch, and applying this update fully mitigates the issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-passenger-2025-26803
- Osv Schema Version
- 1.5.0
- Aliases
- ["CVE-2025-26803"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- High
Patch Information
Threat ID: 6aa005e2acd9273b49ab60d7
Added to database: 09/08/2026, 12:56:02 UTC
Last enriched: 09/08/2026, 13:28:40 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 5
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