Medium 6.5Published Jul 17, 2026

CVE-2026-49209Symfony UX is a JavaScript ecosystem for Symfony.

Updated under an hour ago (2026-10-19 06:25 UTC)

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It affects symfony ux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for symfony ux

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

symfony ux symfony:ux	from 2.5.0 before 2.36.0; 3.0.0	NVD

References

https://github.com/symfony/ux/commit/95e878d5257f13d6d652ca95e3ef6bb0934d674fpatch
https://github.com/symfony/ux/releases/tag/v2.36.0release-notes
https://github.com/symfony/ux/releases/tag/v3.1.0release-notes
https://github.com/symfony/ux/security/advisories/GHSA-mm82-c99c-h2cfvendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.