Vulnerability · CVE-2024-50340

sensiolabs symfony Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Published Sep 10, 2026 · corrected/updated Sep 10, 2026 · sensiolabs symfony · evidence confidence very high

symfony/runtime is a module for the Symphony PHP framework which enables decoupling PHP applications from global state. When the php directive is set to , and users call any URL with a special crafted query string, they are able to change the environment or debug mode used by the kernel when handling the request. As of versions 5.4.46, 6.4.14, and 7.1.7 the now ignores the values for non-SAPI PHP runtimes. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2024-50340 is a unknown public vulnerability record for sensiolabs symfony. CISA lists it as known exploited. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether sensiolabs symfony is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: sensiolabs symfony. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: EPSS 63.6%. CISA lists it as known exploited. Sources contributing to this record: epss, vulncheck_kev. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

Exploitation evidence
Confirmed in CISA KEV since Sep 10, 2026. Listed in CISA KEV and VulnCheck KEV.
Patch and remediation
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

Sep 10, 2026 · VulnCheck KEV
Detected
symfony/runtime is a module for the Symphony PHP framework which enables decoupling PHP applications from global state. When the php directive is set to , and users call any URL with a special crafted query string, they are able to change the environment or debug mode used by the kernel when handling the request. As of versions 5.4.46, 6.4.14, and 7.1.7 the now ignores the values for non-SAPI PHP
Sep 10, 2026 · CISA KEV
Known exploited
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected

vendor sensiolabs symfonyversion unspecified

Sources

FIRST EPSSExploitation probabilityCVE-2024-50340
30-day exploitation probability 63.6%
first.org
VulnCheck KEVConfirmed exploitationCVE-2024-50340
symfony/runtime is a module for the Symphony PHP framework which enables decoupling PHP applications from global state. When the php directive is set to , and users call any URL with a special crafted query string, they are able to change the environment or debug mode used by the
vulncheck.com