Which products and versions are affected by CVE-2024-50340?

Affected: symfony/runtime (composer) versions >= 7.0.0; symfony/symfony (composer) versions >= 7.0.0; symfony (debian) versions >= < 5.4.46. The full list is in the CVE brief.

Is CVE-2024-50340 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Sep 10, 2026.

Is CVE-2024-50340 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2024-50340?

No public exploit code is known.

Is there a fix for CVE-2024-50340?

Fixed versions are available, including symfony 5.4.23+dfsg-1+deb12u3, symfony 5.4.4+dfsg-1ubuntu8+esm1, symfony 5.4.53+dfsg-0+deb12u1.

How urgently should CVE-2024-50340 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2024-50340

Q: What is CVE-2024-50340?

symfony/runtime is a module for the Symphony PHP framework which enables decoupling PHP applications from global state.

Q: Is CVE-2024-50340 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Sep 10, 2026.

Q: Is CVE-2024-50340 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Q: Is there a public exploit for CVE-2024-50340?

No public exploit code is known.

Q: Is there a fix for CVE-2024-50340?

Fixed versions are available, including symfony 5.4.23+dfsg-1+deb12u3, symfony 5.4.4+dfsg-1ubuntu8+esm1, symfony 5.4.53+dfsg-0+deb12u1.

Q: How urgently should CVE-2024-50340 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

MediumExploited

Symfony allows changing the environment through a query

Published Nov 6, 2024 · Updated Aug 12, 2026 · Also known as DEBIAN-CVE-2024-50340, DSA-5809-1, GHSA-x8vp-gf4q-mw5j, UBUNTU-CVE-2024-50340

Key Facts

Patch immediately

CVE-2024-50340 is a medium-severity vulnerability (CVSS 6.9 v4) affecting symfony/runtime (composer), symfony/symfony (composer), symfony (debian).
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Sep 10, 2026. No public exploit code is known.
EPSS estimates a 64% probability of exploitation in the next 30 days.
Fixed versions are available, including symfony 5.4.23+dfsg-1+deb12u3, symfony 5.4.4+dfsg-1ubuntu8+esm1, symfony 5.4.53+dfsg-0+deb12u1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v4

6.9

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

EPSS (30-day exploit likelihood)

64%

Higher than 99.2% of all scored CVEs

Exploited in the wild

Yes

2 catalog listings

Public exploit code

None known

Get the full CVE-2024-50340 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

symfony/runtime is a module for the Symphony PHP framework which enables decoupling PHP applications from global state. When the register_argv_argc php directive is set to on , 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 SymfonyRuntime now ignores the argv values for non-SAPI PHP runtimes. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Sep 10, 2026	n/a	Not reported
CIRCL KEV	Sep 10, 2026	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

17 affected entries in total

Product	Affected versions	Fixed in
symfony/runtimecomposer	>= 7.0.0	7.1.7
symfony/symfonycomposer	>= 7.0.0	7.1.7
symfonydebian	>= < 5.4.46	5.4.23+dfsg-1+deb12u3

Patched Releases

symfony

5.4.23+dfsg-1+deb12u3, 5.4.4+dfsg-1ubuntu8+esm1, 5.4.53+dfsg-0+deb12u1, 6.4.14+dfsg-1, 6.4.41+dfsg-0+deb13u1, 6.4.5+dfsg-3ubuntu3+esm1

symfony/runtime

5.4.46, 6.4.14, 7.1.7

symfony/symfony

5.4.46, 6.4.14, 7.1.7

Timeline

Publicly disclosed
Nov 6, 2024
Last updated
Aug 12, 2026
Added to Industry KEV feed
Sep 10, 2026
Added to CIRCL KEV
Sep 10, 2026

Weakness Type

CWE-20 Improper Input Validation
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

References

15 more references in the full CVE brief

FAQ

Common Questions.

symfony/runtime is a module for the Symphony PHP framework which enables decoupling PHP applications from global state.
Affected: symfony/runtime (composer) versions >= 7.0.0; symfony/symfony (composer) versions >= 7.0.0; symfony (debian) versions >= < 5.4.46. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Sep 10, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including symfony 5.4.23+dfsg-1+deb12u3, symfony 5.4.4+dfsg-1ubuntu8+esm1, symfony 5.4.53+dfsg-0+deb12u1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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