CVE-2026-49209

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Source
https://cve.org/CVERecord?id=CVE-2026-49209
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49209.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-49209
Aliases
Published
2026-07-17T16:02:06.498Z
Modified
2026-07-19T03:46:31.114110930Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Symfony UX: Denial of service in symfony/ux-live-component via unbounded batch action requests
Details

Symfony UX is a JavaScript ecosystem for Symfony. From 2.5.0 until 2.36.0 and 3.1.0, Symfony\UX\LiveComponent\Controller\BatchActionController::__invoke() iterates over the client-supplied actions array and issues a full HttpKernel sub-request for each entry; because the array size is never bounded, an authenticated client can submit a single _batch request containing thousands of actions and exhaust CPU, memory, and database connections on the application server. This issue is fixed in versions 2.36.0 and 3.1.0.

Database specific 
{
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49209.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/symfony/ux

Affected ranges

Type
GIT
Repo
https://github.com/symfony/ux
Events
Introduced
3cef8e0d9557bbde60c3f1bfd2cbb1004af7fc9a
Introduced
240028f49fcbe5a9ba16334a19a3bb120b5c22fc
Fixed
4c883fdb0f0e7ea577f851bd457024f7e88788c9
Fixed
5ccec9746faa28d79a87138042174c3853d5702b
Fixed
95e878d5257f13d6d652ca95e3ef6bb0934d674f
Database specific 
{
    "extracted_events": [
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.1.0"
        },
        {
            "introduced": "2.5.0"
        },
        {
            "fixed": "2.36.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v2.*
v2.10.0
v2.11.0
v2.11.1
v2.11.2
v2.12.0
v2.13.0
v2.13.1
v2.13.2
v2.13.3
v2.14.0
v2.14.1
v2.14.2
v2.15.0
v2.16.0
v2.17.0
v2.18.0
v2.18.1
v2.19.0
v2.19.1
v2.19.2
v2.19.3
v2.20.0
v2.21.0
v2.22.0
v2.22.1
v2.23.0
v2.24.0
v2.25.0
v2.25.1
v2.25.2
v2.26.0
v2.26.1
v2.27.0
v2.28.0
v2.28.1
v2.28.2
v2.29.0
v2.29.1
v2.29.2
v2.30.0
v2.31.0
v2.32.0
v2.33.0
v2.34.0
v2.35.0
v2.5.0
v2.6.0
v2.6.1
v2.7.0
v2.7.1
v2.8.0
v2.8.1
v2.9.0
v2.9.1
v3.*
v3.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49209.json"