UBUNTU-CVE-2026-45071
A vulnerability in the Symfony PHP framework prior to versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12 allows attacker-supplied XML to expand local file entities due to improper handling of XML external entity resolution in the Crawler::addXmlContent() method. This issue is fixed in the specified versions.
AI Analysis
Technical Summary
Symfony versions before 5.4.52, 6.4.40, 7.4.12, and 8.0.12 have a vulnerability where the Crawler::addXmlContent() method sets DOMDocument::$validateOnParse to true before calling loadXML(). This re-enables external entity resolution, allowing attacker-supplied XML to expand file:// entities such as local files. The vulnerability is addressed by disabling this behavior in the fixed versions.
Potential Impact
An attacker can supply crafted XML content that triggers expansion of local file entities, potentially exposing local files to unauthorized access. The vulnerability does not require privileges or user interaction and can be exploited remotely over the network. No known exploits in the wild have been reported.
Mitigation Recommendations
This vulnerability is fixed in Symfony versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12. Users should upgrade to these or later versions to remediate the issue. No other mitigation or temporary fix is indicated.
UBUNTU-CVE-2026-45071
Description
A vulnerability in the Symfony PHP framework prior to versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12 allows attacker-supplied XML to expand local file entities due to improper handling of XML external entity resolution in the Crawler::addXmlContent() method. This issue is fixed in the specified versions.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]?arch=source&distro=xenialpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu0.1+esm2?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1+esm2?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu8+esm1?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/[email protected]+dfsg-3ubuntu3+esm1?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]+dfsg-1?arch=source&distro=questingpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Symfony versions before 5.4.52, 6.4.40, 7.4.12, and 8.0.12 have a vulnerability where the Crawler::addXmlContent() method sets DOMDocument::$validateOnParse to true before calling loadXML(). This re-enables external entity resolution, allowing attacker-supplied XML to expand file:// entities such as local files. The vulnerability is addressed by disabling this behavior in the fixed versions.
Potential Impact
An attacker can supply crafted XML content that triggers expansion of local file entities, potentially exposing local files to unauthorized access. The vulnerability does not require privileges or user interaction and can be exploited remotely over the network. No known exploits in the wild have been reported.
Mitigation Recommendations
This vulnerability is fixed in Symfony versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12. Users should upgrade to these or later versions to remediate the issue. No other mitigation or temporary fix is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-45071
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b4b168715ace43da9596
Added to database: 07/16/2026, 10:38:41 UTC
Last enriched: 07/16/2026, 12:48:20 UTC
Last updated: 07/16/2026, 12:48:20 UTC
Views: 2
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