CVE-2026-45071Network attack vector

Local file disclosure via external entity expansion

Published Jul 14, 2026 · Updated Jul 14, 2026

XXE in Symfony DomCrawler releases before 5.4.52, 6.4.40, 7.4.12, or 8.0.12 allows remote attackers to read local files. Crawler::addXmlContent() enables DOMDocument validation before loadXML(), causing libxml to process external file entities despite the LIBXML_NONET option. Exploitation requires a consuming application to pass attacker-controlled XML to this method and expose the expanded entity content; network entity retrieval remains blocked.

CVSS severity8.7
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in Symfony DomCrawler releases before 5.4.52, 6.4.40, 7.4.12, or 8.0.12 allows remote attackers to read local files. Crawler::addXmlContent() enables DOMDocument validation before loadXML(), causing libxml to process external file entities despite the LIBXML_NONET option. Exploitation requires a consuming application to pass attacker-controlled XML to this method and expose the expanded entity content; network entity retrieval remains blocked.

The record

CVE
CVE-2026-45071
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Symfony
Product
Symfony
Classifications
CWE-611, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.4.52
  2. Affected versionversion=>= 6.0.0-BETA1, < 6.4.40
  3. Affected versionversion=>= 7.0.0-BETA1, < 7.4.12
  4. Affected versionversion=>= 8.0.0-BETA1, < 8.0.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Symfony · Symfonyversion=< 5.4.52; version=>= 6.0.0-BETA1, < 6.4.40; version=>= 7.0.0-BETA1, < 7.4.12; version=>= 8.0.0-BETA1, < 8.0.12
Symfony · Symfony DomCrawlerversion=< 5.4.52; version=>= 6.0.0-BETA1, < 6.4.40; version=>= 7.0.0-BETA1, < 7.4.12; version=>= 8.0.0-BETA1, < 8.0.12

Published CVSS scores

1.3GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
8.7GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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