CVE-2026-45756
Symfony: JsonPath Evaluates Attacker-Controlled Regular Expressions in match()/search() Without Limits — ReDoS
Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 7.3.0-BETA1 until 7.4.12 and 8.0.12, the JsonPath component compiles attacker-controlled match() and search() filter patterns directly into preg_match() without a length cap, i-regexp restriction, or bounded backtracking, allowing catastrophic-backtracking expressions to pin worker CPU and cause denial of service. This issue is fixed in versions 7.4.12 and 8.0.12.
INFO
Published Date :
July 14, 2026, 6:17 p.m.
Last Modified :
July 21, 2026, 7:17 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 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- 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-2026-45756.
| URL | Resource |
|---|---|
| https://github.com/symfony/symfony/commit/1ac2d47418ec23066112db1e6ca35be6fe123d14 | Patch |
| 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-8v8v-g73j-492j | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45756 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-2026-45756
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-2026-45756 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45756 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. 21, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-45756', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-21T18:48:48.712996Z'} -
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:N/I:N/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) 7.3.0 up to (excluding) 7.4.12 Added Reference Type GitHub, Inc.: https://github.com/symfony/symfony/commit/1ac2d47418ec23066112db1e6ca35be6fe123d14 Types: Patch 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-8v8v-g73j-492j Types: Patch, Vendor Advisory -
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': '>= 7.3.0-BETA1, < 7.4.12'}, {'status': 'affected', 'version': '>= 8.0.0-BETA1, < 8.0.12'}]}, {'vendor': 'symfony', 'product': 'json-path', 'versions': [{'status': 'affected', 'version': '>= 7.3.0-BETA1, < 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 7.3.0-BETA1 until 7.4.12 and 8.0.12, the JsonPath component compiles attacker-controlled match() and search() filter patterns directly into preg_match() without a length cap, i-regexp restriction, or bounded backtracking, allowing catastrophic-backtracking expressions to pin worker CPU and cause denial of service. This issue is fixed in versions 7.4.12 and 8.0.12. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/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-400 Added CWE CWE-1333 Added Reference https://github.com/symfony/symfony/commit/1ac2d47418ec23066112db1e6ca35be6fe123d14 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-8v8v-g73j-492j