CVE-2026-45071
highPriorität · verfolgen · 40EPSS 0.006 · 47. PerzentilExploit · PoCEUUSEPSS · bewertet 2026-10-27
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::$validateOnParse = true before loadXML(), re-enabling external entity resolution and allowing attacker-supplied XML to expand file:// entities such as local files. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
cvss
Technischer Schweregrad, 0–10. Eine Zeile je Quelle.
Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen
SSVC
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Exploits (1)
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betroffene Produkte (20)
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Advisories (1)
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- GHSA-x6g4-fwcc-jj8wSymfony has XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true2026-05-27ghsa · osvUS
### Description `symfony/dom-crawler` provides the `Crawler` class for navigating HTML/XML documents with CSS/XPath selectors; `symfony/browser-kit`'s `HttpBrowser` uses it to parse fetched pages. `Crawler::addXmlContent()` sets `DOMDocument::$validateOnParse = true` before calling `loadXML()`. Setting `validateOnParse` re-enables libxml's DTD subset processing, including external entity resolution, even though `LIBXML_NONET` is passed. `LIBXML_NONET` blocks **network** fetches but not `file://` entities. An attacker-supplied XML document with a `SYSTEM "file:///etc/passwd"` entity is therefore expanded. ### Resolution The `Crawler::addXmlContent` method does not set the `validateOnParse` flag anymore. The patch for this issue is available [here](https://github.com/symfony/symfony/commit/eea5fd7488cbdc241da4ce242344b7d9a3ecdf3d) for branch 5.4. ### Credits Symfony would like to thank Claude Mythos Preview (via Project Glasswing) for reporting the issue and providing the fix.
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Referenzen (19)
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- https://github.com/symfony/symfony/commit/eea5fd7488cbdc241da4ce242344b7d9a3ecdf3dcnnvd
- https://github.com/symfony/symfony/releasesPatchcnnvd
- https://github.com/symfony/symfony/releases/tag/v5.4.52cnnvd
- https://github.com/symfony/symfony/releases/tag/v6.4.40cnnvd
- https://github.com/symfony/symfony/releases/tag/v7.4.12cnnvd
- https://github.com/symfony/symfony/releases/tag/v8.0.12cnnvd
- https://github.com/symfony/symfony/security/advisories/GHSA-x6g4-fwcc-jj8wcnnvd
- https://github.com/symfony/symfony/commit/eea5fd7488cbdc241da4ce242344b7d9a3ecdf3denisa_euvd
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