Vulnerability · Published Jul 14, 2026 · Assigned by GitHub_M
CVE-2026-45071Symfony: XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true
High 8.7
In plain English
A high-severity XML external entity in dom-crawler 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 47% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Crawler::addXmlContent() set DOMDocument::$validateOnParse = true before loadXML(), re-enabling external entity resolution and allowing attacker-supplied XML to expand file:// entities such as local files. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | symfony | 5.4.53+dfsg-0+deb12u1 | DEBIAN-CVE-2026-45071 |
| Debian:13 | symfony | 6.4.41+dfsg-0+deb13u1 | DEBIAN-CVE-2026-45071 |
| Debian:14 | symfony | 7.4.12+dfsg-1 | DEBIAN-CVE-2026-45071 |
| Packagist | symfony/dom-crawler | 5.4.52 | GHSA-x6g4-fwcc-jj8w |
| Packagist | symfony/dom-crawler | 8.0.12 | GHSA-x6g4-fwcc-jj8w |
| Packagist | symfony/dom-crawler | 6.4.40 | GHSA-x6g4-fwcc-jj8w |
| Packagist | symfony/dom-crawler | 7.4.12 | GHSA-x6g4-fwcc-jj8w |
| Packagist | symfony/symfony | 8.0.12 | GHSA-x6g4-fwcc-jj8w |
| Packagist | symfony/symfony | 5.4.52 | GHSA-x6g4-fwcc-jj8w |
| Packagist | symfony/symfony | 6.4.40 | GHSA-x6g4-fwcc-jj8w |
| Packagist | symfony/symfony | 7.4.12 | GHSA-x6g4-fwcc-jj8w |
| Ubuntu:25.10 | symfony | no fix listed | UBUNTU-CVE-2026-45071 |
| Ubuntu:26.04:LTS | symfony | no fix listed | UBUNTU-CVE-2026-45071 |
| Ubuntu:26.10 | symfony | no fix listed | UBUNTU-CVE-2026-45071 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| symfony | symfony | < 5.4.52>= 6.0.0-BETA1, < 6.4.40>= 7.0.0-BETA1, < 7.4.12>= 8.0.0-BETA1, < 8.0.12 |
| symfony | dom-crawler | < 5.4.52>= 6.0.0-BETA1, < 6.4.40>= 7.0.0-BETA1, < 7.4.12>= 8.0.0-BETA1, < 8.0.12 |
Weakness: CWE-611 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/symfony/symfony/security/advisories/GHSA-x6g4-fwcc-jj8w x_refsource_CONFIRM
- https://github.com/symfony/symfony/commit/eea5fd7488cbdc241da4ce242344b7d9a3ecdf3d x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v5.4.52 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v6.4.40 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v7.4.12 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v8.0.12 x_refsource_MISC