CVE-2026-45756 json
Symfony: JsonPath Evaluates Attacker-Controlled Regular Expressions in match()/search() Without Limits — ReDoS
published 2026-05-28 5 mo ago modified 2026-09-10 1 mo ago also GHSA-8v8v-g73j-492j , EUVD-2026-44340
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist symfony/json-path 7.4.12, 8.0.12
- packagist symfony/symfony 7.4.12, 8.0.12
- sensiolabs symfony 7.4.12, 8.0.12
- symfony Debian 14 7.4.12+dfsg-1
debian advisories DEBIAN-CVE-2026-45756
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.2 | 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 |
| CNA | 4.0 | 8.2 | 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/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 |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | symfony/json-path | >=7.3.0, <7.4.12 >=8.0.0, <8.0.12 |
7.4.12 8.0.12 |
| packagist | symfony/symfony | >=7.3.0, <7.4.12 >=8.0.0, <8.0.12 |
7.4.12 8.0.12 |
Affected products
- symfony symfony
- symfony json-path
Classification
References
-
github.com
/symfony/symfony/commit/1ac2d47418ec23066112db1e6ca35be6fe123d14
web, patch
-
github.com
/symfony/symfony/security/advisories/GHSA-8v8v-g73j-492j
web, patch, vendor-advisory
-
github.com
/symfony/symfony/releases/tag/v7.4.12
product, release-notes
-
github.com
/symfony/symfony/releases/tag/v8.0.12
product, release-notes
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/json-path/CVE-2026-45756.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45756.yaml
web
-
github.com
/symfony/symfony
package
-
symfony.com
/cve-2026-45756
web
Sources
- CVE List CVE-2026-45756
- GitHub Advisory GHSA-8v8v-g73j-492j
- NVD CVE-2026-45756
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