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CVE-2026-56411

🗓️ 21 Jun 2026 15:56:42Reported by mitreType 
cve
 cve
🔗 web.nvd.nist.gov👁 47 Views

CVE-2026-56411: libexpat xmlwf overflow in endDoctypeDecl via NOTATION declarations.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ibm
IBM Security Bulletins
Security Bulletin: Multiple vulnerabilities in Python affects AIX/VIOS.
15 Jul 202609:53
ibm
attackerkb
ATTACKERKB
CVE-2026-56411
21 Jun 202615:56
attackerkb
alpinelinux
AlpineLinux
CVE-2026-56411
21 Jun 202615:56
alpinelinux
cbl_mariner
CBLMariner
CVE-2026-56411 affecting package expat for versions less than 2.8.2-1
8 Jul 202616:02
cbl_mariner
cgr
Chainguard
CVE-2026-56411 vulnerabilities
25 Jun 202620:36
cgr
circl
Circl
CVE-2026-56411
26 Jun 202600:01
circl
cvelist
Cvelist
CVE-2026-56411
21 Jun 202615:56
cvelist
freebsd
FreeBSD
Multiple vulnerability found in Expat
25 Jun 202600:00
freebsd
debian
Debian
[SECURITY] [DSA 6404-1] expat security update
30 Jul 202608:38
debian
debiancve
Debian CVE
CVE-2026-56411
21 Jun 202615:56
debiancve
Rows per page
NVD
Vulners
CNA
[
  {
    "defaultStatus": "unaffected",
    "product": "libexpat",
    "vendor": "libexpat project",
    "versions": [
      {
        "lessThan": "2.8.2",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      }
    ]
  }
]

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23 Jun 2026 16:16Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.16.9
EPSS0.00139
SSVC
47