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OpenAdvisories
High · 8.7 Public exploit CVE-2026-45071 EUVD-2026-44368GHSA-x6g4-fwcc-jj8w

Symfony: XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true

Published Jul 14, 2026 · Updated Jul 15, 2026 · Assigned by GitHub_M

Vendor: symfony Product: dom-crawler Product: symfony Package: nextcloud-server-33 Package: symfony Package: symfony Package: symfony/dom-crawler Package: symfony/symfony Ecosystem: Debian Ecosystem: Packagist Ecosystem: Ubuntu Ecosystem: Wolfi

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 products

VendorProductAffectedFixed
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 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 symfony 7.4.12+dfsg-1 —
Debian 13 symfony 6.4.41+dfsg-0+deb13u1 —
Debian 12 symfony 5.4.53+dfsg-0+deb12u1 —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 26.10 symfony No fix yet —
Ubuntu 26.04 LTS symfony No fix yet —
Ubuntu 25.10 symfony No fix yet —
Ubuntu 16.04 LTS symfony No fix yet —
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 24.04 LTS symfony No fix yet —
Ubuntu Pro 22.04 LTS symfony No fix yet —
Ubuntu Pro 20.04 LTS symfony No fix yet —
Ubuntu Pro 18.04 LTS symfony No fix yet —

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling nextcloud-server-33 33.0.5-r2 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • bozellqp/zk-xml-probe ★ 0 · Aug 29, 2026

    Static XML fixtures for authorized bug bounty testing of XML parser behaviour (CVE-2026-45071).

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist symfony/dom-crawler < 5.4.52 5.4.52 GHSA-x6g4-fwcc-jj8w
Packagist symfony/dom-crawler >= 6.0.0, < 6.4.40 6.4.40 GHSA-x6g4-fwcc-jj8w
Packagist symfony/dom-crawler >= 7.0.0, < 7.4.12 7.4.12 GHSA-x6g4-fwcc-jj8w
Packagist symfony/dom-crawler >= 8.0.0, < 8.0.12 8.0.12 GHSA-x6g4-fwcc-jj8w
Packagist symfony/symfony < 5.4.52 5.4.52 GHSA-x6g4-fwcc-jj8w
Packagist symfony/symfony >= 6.0.0, < 6.4.40 6.4.40 GHSA-x6g4-fwcc-jj8w
Packagist symfony/symfony >= 7.0.0, < 7.4.12 7.4.12 GHSA-x6g4-fwcc-jj8w
Packagist symfony/symfony >= 8.0.0, < 8.0.12 8.0.12 GHSA-x6g4-fwcc-jj8w

References