CVE-2026-45071
published 2026-07-14CVE-2026-45071: 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…
PriorityP347high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.46%
37.5th percentile
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
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| sensiolabs | symfony | < 5.4.52 | 5.4.52 |
| sensiolabs | symfony | >= 6.0.0 < 6.4.40 | 6.4.40 |
| sensiolabs | symfony | >= 7.0.0 < 7.4.12 | 7.4.12 |
| sensiolabs | symfony | >= 8.0.0 < 8.0.12 | 8.0.12 |
| symfony | dom-crawler | < 5.4.52 | 5.4.52 |
| symfony | dom-crawler | — | — |
| symfony | dom-crawler | — | — |
| symfony | dom-crawler | — | — |
| symfony | dom-crawler | >= 0 < 5.4.52 | 5.4.52 |
| symfony | dom-crawler | >= 6.0.0 < 6.4.40 | 6.4.40 |
| symfony | dom-crawler | >= 7.0.0 < 7.4.12 | 7.4.12 |
| symfony | dom-crawler | >= 8.0.0 < 8.0.12 | 8.0.12 |
| symfony | symfony | < 5.4.52 | 5.4.52 |
| symfony | symfony | — | — |
| symfony | symfony | — | — |
| symfony | symfony | — | — |
| symfony | symfony | >= 0 < 5.4.52 | 5.4.52 |
| symfony | symfony | >= 6.0.0 < 6.4.40 | 6.4.40 |
| symfony | symfony | >= 7.0.0 < 7.4.12 | 7.4.12 |
| symfony | symfony | >= 8.0.0 < 8.0.12 | 8.0.12 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
Symfony addXmlContent xml external entity reference
vuldb·2026-05-28
CVE-2026-45071 [CRITICAL] Symfony addXmlContent xml external entity reference
A vulnerability classified as problematic was found in Symfony. This issue affects the function DomCrawler::addXmlContent. Executing a manipulation can lead to xml external entity reference.
This vulnerability appears as CVE-2026-45071. The attack may be performed from remote. There is no available exploit.
Upgrading the affected component is advised.
GHSA
Symfony has XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true
ghsa·2026-05-27
CVE-2026-45071 [LOW] CWE-611 Symfony has XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true
Symfony has XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true
### 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`
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/symfony/symfony/commit/eea5fd7488cbdc241da4ce242344b7d9a3ecdf3dhttps://github.com/symfony/symfony/releases/tag/v5.4.52https://github.com/symfony/symfony/releases/tag/v6.4.40https://github.com/symfony/symfony/releases/tag/v7.4.12https://github.com/symfony/symfony/releases/tag/v8.0.12https://github.com/symfony/symfony/security/advisories/GHSA-x6g4-fwcc-jj8w
2026-07-14
Published