ReactPHP's HTTP server continues parsing unused multipart parts after reaching input field and file upload limits
Summary
Previous versions of ReactPHP's HTTP server component contain a potential DoS vulnerability that can cause high CPU load when processing large HTTP request bodies. This vulnerability has little to no impact on the default configuration, but can be exploited when explicitly using the RequestBodyBufferMiddleware with very large settings. This might lead to consuming large amounts of CPU time for processing requests and significantly delay or slow down the processing of legitimate user requests.
Patches
The supplied patch resolves this vulnerability for ReactPHP.
Workarounds
-
Keeping the request body limit using
RequestBodyBufferMiddlewaresensible will mitigate it. -
Infrastructure or DevOps can place a reverse proxy in front of the ReactPHP HTTP server to filter out any excessive HTTP request bodies.
References
A similar vulnerability was discovered in PHP recently, see also PHP's security advisory (CVE-2023-0662). The fix is based on the PHP-FPM fix.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | react/http | >= 0.8.0, < 1.9.0 | 1.9.0 |
References
- https://github.com/php/php-src/security/advisories/GHSA-54hq-v5wp-fqgv
- https://github.com/reactphp/http/security/advisories/GHSA-95x4-j7vc-h8mf
- https://nvd.nist.gov/vuln/detail/CVE-2023-26044
- https://github.com/php/php-src/commit/716de0cff539f46294ef70fe75d548cd66766370#diff-81d659aa9e83177ac08151f99cebf21ab331d22462c72a1039f59947e66f5a35
- https://github.com/reactphp/http/commit/9681f764b80c45ebfb5fe2ea7da5bd3babfcdcfd
- https://github.com/FriendsOfPHP/security-advisories/blob/master/react/http/CVE-2023-26044.yaml
- https://github.com/advisories/GHSA-95x4-j7vc-h8mf
- https://github.com/reactphp/http
- https://github.com/reactphp/http/releases/tag/v1.9.0
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-400- Platform
- Composer
- Package
react/http- Disclosed
- 17.05.2023
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-95x4-j7vc-h8mf - CC BY 4.0
Vulnerability history: react/http
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 09.2022 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 2
Disclosures per year
- 2022: 1
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 1
-
ReactPHP's HTTP server continues parsing unused multipart parts after reaching input field and file upload limits this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.