CVE-2026-45071
Symfony has XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true
描述
### 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.
如何修補 CVE-2026-45071
目前尚未發布修補版本。可考慮移除受影響套件,或參考下方連結中的上游建議。
- —未列出修補版本
CVE-2026-45071 正在被利用嗎?
低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |