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Vulnerability · Published Jul 14, 2026 · Assigned by GitHub_M

CVE-2026-45756Symfony: JsonPath Evaluates Attacker-Controlled Regular Expressions in match()/search() Without Limits — ReDoS

High 8.2

In plain English

A high-severity uncontrolled resource consumption in json-path from symfony. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.2High
Exploit odds (30 days)0.6%top 49.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:14symfony7.4.12+dfsg-1DEBIAN-CVE-2026-45756
Packagistsymfony/json-path8.0.12GHSA-8v8v-g73j-492j
Packagistsymfony/json-path7.4.12GHSA-8v8v-g73j-492j
Packagistsymfony/symfony8.0.12GHSA-8v8v-g73j-492j
Packagistsymfony/symfony7.4.12GHSA-8v8v-g73j-492j
Ubuntu:25.10symfonyno fix listedUBUNTU-CVE-2026-45756
Ubuntu:26.04:LTSsymfonyno fix listedUBUNTU-CVE-2026-45756
Ubuntu:26.10symfonyno fix listedUBUNTU-CVE-2026-45756

Affected products (as reported)

VendorProductVersions
symfony symfony >= 7.3.0-BETA1, < 7.4.12>= 8.0.0-BETA1, < 8.0.12
symfony json-path >= 7.3.0-BETA1, < 7.4.12>= 8.0.0-BETA1, < 8.0.12

Weakness: CWE-400, CWE-1333 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References