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CVE-2026-56817 Netty: XML External Entity (XXE) injection via unconfigured XML factory when DTD and entity processing are enabled

🗓️ 21 Jul 2026 22:06:56Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 42 Views

Netty XXE risk from an unconfigured XML factory with DTD; fixed in the 4.1.136 and 4.2.16 releases.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cgr
Chainguard
CVE-2026-56817 vulnerabilities
25 Jul 202602:16
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circl
Circl
CVE-2026-56817
22 Jul 202602:10
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cve
CVE
CVE-2026-56817
21 Jul 202622:06
cve
debiancve
Debian CVE
CVE-2026-56817
21 Jul 202622:06
debiancve
euvd
EUVD
EUVD-2026-47579
22 Jul 202621:43
euvd
github
Github Security Blog
Netty XML: Injection / Risky Sink — unconfigured XML factory with active DTD and entity handling
22 Jul 202621:43
github
nvd
NVD
CVE-2026-56817
21 Jul 202623:17
nvd
osv
OSV
CGA-JWRX-2PHW-JCP2
24 Jul 202623:47
osv
osv
OSV
DEBIAN-CVE-2026-56817
21 Jul 202623:17
osv
osv
OSV
GHSA-4QHR-G3C6-FCFX Netty XML: Injection / Risky Sink — unconfigured XML factory with active DTD and entity handling
22 Jul 202621:43
osv
Rows per page
[
  {
    "vendor": "netty",
    "product": "netty",
    "versions": [
      {
        "version": ">= 4.2.0.Final, < 4.2.16.Final",
        "status": "affected"
      },
      {
        "version": ">= 4.1.0.Final, < 4.1.136.Final",
        "status": "affected"
      }
    ]
  }
]

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