CVE-2026-49209: CWE-770: Allocation of Resources Without Limits or Throttling in symfony ux
CVE-2026-49209 is a medium severity vulnerability in Symfony UX affecting versions from 2.5.0 up to but not including 2.36.0 and 3.1.0. The vulnerability arises because the BatchActionController::__invoke() method processes a client-supplied array of actions without limiting its size. An authenticated client can submit a batch request with thousands of actions, causing excessive consumption of CPU, memory, and database connections, potentially leading to denial of service. The issue is fixed starting from versions 2.36.0 and 3.1.0.
AI Analysis
Technical Summary
Symfony UX versions 2.5.0 through before 2.36.0 and versions before 3.1.0 contain a resource exhaustion vulnerability (CWE-770) in the BatchActionController::__invoke() method. This method iterates over a client-supplied array of actions and issues a full HttpKernel sub-request for each action without any limit on the array size. As a result, an authenticated attacker can submit a single batch request containing thousands of actions, exhausting server CPU, memory, and database connections. This vulnerability is addressed in Symfony UX versions 2.36.0 and 3.1.0.
Potential Impact
An authenticated attacker can cause resource exhaustion on the application server by submitting a large batch of actions in a single request. This can lead to denial of service conditions by consuming excessive CPU, memory, and database connections, potentially impacting the availability and performance of the affected application.
Mitigation Recommendations
A fix is available in Symfony UX versions 2.36.0 and 3.1.0. Users should upgrade to these versions or later to remediate this vulnerability. Since the vendor advisory or patch links are not explicitly provided, check the official Symfony release notes or security advisories for confirmation and upgrade instructions. No alternative mitigations are specified.
CVE-2026-49209: CWE-770: Allocation of Resources Without Limits or Throttling in symfony ux
Description
CVE-2026-49209 is a medium severity vulnerability in Symfony UX affecting versions from 2.5.0 up to but not including 2.36.0 and 3.1.0. The vulnerability arises because the BatchActionController::__invoke() method processes a client-supplied array of actions without limiting its size. An authenticated client can submit a batch request with thousands of actions, causing excessive consumption of CPU, memory, and database connections, potentially leading to denial of service. The issue is fixed starting from versions 2.36.0 and 3.1.0.
CVSS v4.0
Score 5.3medium
Affected software
pkg:github/symfony/uxRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Symfony UX versions 2.5.0 through before 2.36.0 and versions before 3.1.0 contain a resource exhaustion vulnerability (CWE-770) in the BatchActionController::__invoke() method. This method iterates over a client-supplied array of actions and issues a full HttpKernel sub-request for each action without any limit on the array size. As a result, an authenticated attacker can submit a single batch request containing thousands of actions, exhausting server CPU, memory, and database connections. This vulnerability is addressed in Symfony UX versions 2.36.0 and 3.1.0.
Potential Impact
An authenticated attacker can cause resource exhaustion on the application server by submitting a large batch of actions in a single request. This can lead to denial of service conditions by consuming excessive CPU, memory, and database connections, potentially impacting the availability and performance of the affected application.
Mitigation Recommendations
A fix is available in Symfony UX versions 2.36.0 and 3.1.0. Users should upgrade to these versions or later to remediate this vulnerability. Since the vendor advisory or patch links are not explicitly provided, check the official Symfony release notes or security advisories for confirmation and upgrade instructions. No alternative mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-28T03:42:34.340Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5b5eb82d1edb114c7fb6b8
Added to database: 07/18/2026, 11:08:40 UTC
Last enriched: 07/18/2026, 13:15:05 UTC
Last updated: 07/18/2026, 13:20:47 UTC
Views: 2
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