CVE-2026-47767
Symfony: SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch
Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.46 until 5.4.52, 6.4.40, 7.4.12, and 8.0.12, the CVE-2024-50340 fix gated runtime argv parsing on empty($_GET), but parse_str() and the web SAPI can disagree, allowing a crafted query string to leave $_GET empty while $_SERVER['argv'] still carries attacker-controlled --env or --no-debug flags that change APP_ENV or APP_DEBUG. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
INFO
Published Date :
July 14, 2026, 7:17 p.m.
Last Modified :
July 16, 2026, 3:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Symfony to version 5.4.52 or later.
- Update Symfony to version 6.4.40 or later.
- Update Symfony to version 7.4.12 or later.
- Update Symfony to version 8.0.12 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-47767.
| URL | Resource |
|---|---|
| https://github.com/symfony/symfony/commit/3228c3806ee511008bea19a95084d460b17e5d25 | Patch |
| https://github.com/symfony/symfony/releases/tag/v5.4.52 | Product Release Notes |
| https://github.com/symfony/symfony/releases/tag/v6.4.40 | Product Release Notes |
| https://github.com/symfony/symfony/releases/tag/v7.4.12 | Product Release Notes |
| https://github.com/symfony/symfony/releases/tag/v8.0.12 | Product Release Notes |
| https://github.com/symfony/symfony/security/advisories/GHSA-fqc7-9xjw-jrh3 | Not Applicable |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-47767 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-47767
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-47767 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-47767 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 16, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-47767', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-16T14:33:22.499704Z'} -
Initial Analysis by [email protected]
Jul. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.12 *cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* versions from (including) 5.4.46 up to (excluding) 5.4.52 *cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* versions from (including) 6.4.14 up to (excluding) 6.4.40 *cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* versions from (including) 7.1.7 up to (excluding) 7.4.12 Added Reference Type GitHub, Inc.: https://github.com/symfony/symfony/commit/3228c3806ee511008bea19a95084d460b17e5d25 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/symfony/symfony/releases/tag/v5.4.52 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/symfony/symfony/releases/tag/v6.4.40 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/symfony/symfony/releases/tag/v7.4.12 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/symfony/symfony/releases/tag/v8.0.12 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/symfony/symfony/security/advisories/GHSA-fqc7-9xjw-jrh3 Types: Not Applicable -
New CVE Received by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'symfony', 'product': 'symfony', 'versions': [{'status': 'affected', 'version': '>= 5.4.46, < 5.4.52'}, {'status': 'affected', 'version': '>= 6.4.14, < 6.4.40'}, {'status': 'affected', 'version': '>= 7.1.7, < 7.4.12'}, {'status': 'affected', 'version': '>= 8.0.0-BETA1, < 8.0.12'}]}, {'vendor': 'symfony', 'product': 'runtime', 'versions': [{'status': 'affected', 'version': '>= 5.4.46, < 5.4.52'}, {'status': 'affected', 'version': '>= 6.4.14, < 6.4.40'}, {'status': 'affected', 'version': '>= 7.1.7, < 7.4.12'}, {'status': 'affected', 'version': '>= 8.0.0-BETA1, < 8.0.12'}]}] Added Description Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.46 until 5.4.52, 6.4.40, 7.4.12, and 8.0.12, the CVE-2024-50340 fix gated runtime argv parsing on empty($_GET), but parse_str() and the web SAPI can disagree, allowing a crafted query string to leave $_GET empty while $_SERVER['argv'] still carries attacker-controlled --env or --no-debug flags that change APP_ENV or APP_DEBUG. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-436 Added Reference https://github.com/symfony/symfony/commit/3228c3806ee511008bea19a95084d460b17e5d25 Added Reference https://github.com/symfony/symfony/releases/tag/v5.4.52 Added Reference https://github.com/symfony/symfony/releases/tag/v6.4.40 Added Reference https://github.com/symfony/symfony/releases/tag/v7.4.12 Added Reference https://github.com/symfony/symfony/releases/tag/v8.0.12 Added Reference https://github.com/symfony/symfony/security/advisories/GHSA-fqc7-9xjw-jrh3