CVE-2026-45071 Details
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.
A vulnerability exists in the Symfony DomCrawler component, specifically in the Crawler class's addXmlContent method, prior to versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12. The issue arises because the method enables DOMDocument's validateOnParse property before loading XML. This reactivates external entity resolution, allowing attacker-controlled XML to access local files by expanding file:// entities. Exploitation could lead to unauthorized disclosure of sensitive file contents, such as the passwd file.
Users can upgrade to Symfony versions 5.4.52, 6.4.40, 7.4.12, or 8.0.12 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/symfony/symfony/commit/eea5fd7488cbdc241da4ce242344b7d9a3ecdf3d | [email protected] | Patch |
| https://github.com/symfony/symfony/releases/tag/v5.4.52 | [email protected] | ProductRelease Notes |
| https://github.com/symfony/symfony/releases/tag/v6.4.40 | [email protected] | ProductRelease Notes |
| https://github.com/symfony/symfony/releases/tag/v7.4.12 | [email protected] | ProductRelease Notes |
| https://github.com/symfony/symfony/releases/tag/v8.0.12 | [email protected] | ProductRelease Notes |
| https://github.com/symfony/symfony/security/advisories/GHSA-x6g4-fwcc-jj8w | [email protected] | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-611 | Improper Restriction of XML External Entity Reference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| sensiolabs symfony | < 5.4.52 >= 6.0.0, < 6.4.40 >= 7.0.0, < 7.4.12 >= 8.0.0, < 8.0.12 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | CISA-ADP |
| Jul 15, 2026 | Initial Analysis | [email protected] |
| Jul 14, 2026 | New CVE Received | [email protected] |