CVE-2025-26803 json
Phusion Passenger denial of service
published 2025-02-24 20 mo ago modified 2026-09-08 2 mo ago also BIT-passenger-2025-26803 , BIT-passenger-apache-module-2025-26803 , BIT-passenger-nginx-module-2025-26803 , EUVD-2025-4281 , GHSA-2cj2-qqxj-5m3r
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- rubygems passenger 6.0.26
- bitnami passenger 6.0.26
- bitnami passenger-apache-module 6.0.26
- bitnami passenger-nginx-module 6.0.26
- Phusion Passenger 6.0.26
- passenger Debian 14, Debian 13 6.0.26+ds-1
debian advisories DEBIAN-CVE-2025-26803
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2025-26803 updated cvss 5.3
passenger: DoS while parsing a request with an invalid HTTP method
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | passenger | >=6.0.21, <6.0.26 |
6.0.26 |
| bitnami | passenger | >=6.0.21, <6.0.26 |
6.0.26 |
| bitnami | passenger-apache-module | >=6.0.21, <6.0.26 |
6.0.26 |
| bitnami | passenger-nginx-module | >=6.0.21, <6.0.26 |
6.0.26 |
Affected products
- Phusion Passenger
Classification
- Weakness
-
- CWE-908 Use of Uninitialized Resource
References
-
github.com
/phusion/passenger/commit/bb15591646687064ab2d578d5f9660b2a4168017
web, patch
-
github.com
/phusion/passenger/compare/release-6.0.25...release-6.0.26
web, patch
-
github.com
/phusion/passenger/releases/tag/release-6.0.26
web, patch
-
blog.phusion.nl
/2025/02/19/passenger-6-0-26/
vendor-advisory, advisory
-
phusionpassenger.com
/support
web, product
-
nvd.nist.gov
/vuln/detail/CVE-2025-26803
advisory, web
-
blog.phusion.nl
/2025/02/19/passenger-6-0-26
web
-
github.com
/phusion/passenger
package
-
github.com
/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2025-26803.yml
web
Sources
- CVE List CVE-2025-26803
- GitHub Advisory GHSA-2cj2-qqxj-5m3r
- NVD CVE-2025-26803
- OSV BIT-passenger-2025-26803
- OSV BIT-passenger-apache-module-2025-26803
- OSV BIT-passenger-nginx-module-2025-26803
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