EUVD-2026-80779Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Remote unauthenticated attacker sends a trivial malformed chunked body over the network (AV:N/AC:L/PR:N/UI:N); pure infinite-loop DoS freezes the process with no confidentiality or integrity impact (A:H only).
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
5DescriptionCVE.org
react/http is an event-driven, streaming HTTP client and server implementation for ReactPHP. From 0.6.0 until 1.11.1, React\Http\Io\ChunkedDecoder could enter an infinite loop while processing a malformed Transfer-Encoding: chunked body because handleData required its buffer to shrink on every iteration. An incomplete terminal-chunk trailer without CRLF left the buffer unchanged after strpos returned false, and exactly two non-CRLF bytes after a completed non-terminal chunk bypassed both the error and wait guards. The affected decoder processes request bodies for React\Http\HttpServer and response bodies for React\Http\Browser, allowing a malicious client to freeze a server or a malicious or compromised server to freeze a client. A reverse proxy that normalizes inbound requests may protect the server direction but does not protect outbound Browser requests. This issue is fixed in version 1.11.1.
AnalysisAI
Remote, unauthenticated denial of service affects react/http versions 0.6.0 through 1.11.0, where a malformed Transfer-Encoding: chunked body can trap React\Http\Io\ChunkedDecoder in a non-terminating loop; because ReactPHP is single-threaded and event-loop driven, one looping body halts the entire process rather than a single request. The decoder is used for inbound request bodies in React\Http\HttpServer and outbound response bodies in React\Http\Browser, so a malicious client can freeze a server and a malicious or compromised upstream server can freeze a client. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special configuration is required - remote unauthenticated exploitation works against default configurations of any service using React\Http\HttpServer (inbound request bodies) or any client using React\Http\Browser (outbound response bodies) on affected versions 0.6.0 through 1.11.0. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine availability-only issue whose real-world risk is moderate and context-dependent, not a hollow high-CVSS number. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to reactphp/http 1.11.1 or later, for example via "composer require react/http:^1.11.1" (or "composer update react/http" with an appropriate constraint), which incorporates the decoder hardening in commit b6d4688790adf3797071fcf88a3fc4225f30486a; see the vendor advisory at https://github.com/reactphp/http/security/advisories/GHSA-x424-64qh-5j54 and the release at https://github.com/reactphp/http/releases/tag/v1.11.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every service and internal tool that depends on react/http by running composer show react/http (or scanning composer.lock/distributed SBOMs) for versions 0.6.0 through 1.11.0, flag those with any internet-facing listener or any dependency on third-party upstream HTTP endpoints, and validate that malformed chunked request bodies cannot reach those decoders. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it
sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not
(1) boardData102.php, (2) boardData103.php, (3) boardDataJP.php, (4) boardDataNA.php, and (5) boardDataWW.php in Netgear
The '/common/download_agent_installer.php' script in the Quest KACE System Management Appliance 8.0.318 is accessible by
ProjectSend versions prior to r1720 are affected by an improper authentication vulnerability. Rated critical severity (C
Roundcube Webmail contains a critical PHP object deserialization vulnerability (CVE-2025-49113, CVSS 9.9) that allows au
Util/PHP/eval-stdin.php in PHPUnit before 4.8.28 and 5.x before 5.6.3 allows remote attackers to execute arbitrary PHP c
Palo Alto Networks PAN-OS management web interface contains an authentication bypass allowing unauthenticated attackers
Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re
Nagios XI version xi-5.7.5 is affected by OS command injection. Rated high severity (CVSS 8.8), this vulnerability is re
The get_referers function in /opt/ws/bin/sblistpack in Sophos Web Appliance before 3.7.9.1 and 3.8 before 3.8.1.1 allows
The Backup Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1
Same technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today