Improper Input Validation Affecting libxml2-2.9.1 package, versions <2.9.1+e1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
1.66% (76th percentile)

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  • Snyk IDSNYK-ECHOLATEST-LIBXML2291-21429787
  • published22 Oct 2026
  • disclosed9 Jun 2016

Introduced: 9 Jun 2016

CVE-2016-4449  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Echo:latest libxml2-2.9.1 to version 2.9.1+e1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2-2.9.1 package and not the libxml2-2.9.1 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

XML external entity (XXE) vulnerability in the xmlStringLenDecodeEntities function in parser.c in libxml2 before 2.9.4, when not in validating mode, allows context-dependent attackers to read arbitrary files or cause a denial of service (resource consumption) via unspecified vectors.

References

CVSS Base Scores

version 3.1