Integer Coercion Error Affecting libxml2 package, versions <2.12.7+dfsg+really2.9.14-2.1+deb13u3+e1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-LIBXML2-19539865
  • published5 Sept 2026
  • disclosed5 Sept 2026

Introduced: 5 Sep 2026

NewCVE-2026-86143  (opens in a new tab)
CWE-192  (opens in a new tab)

How to fix?

Upgrade Echo:latest libxml2 to version 2.12.7+dfsg+really2.9.14-2.1+deb13u3+e1 or higher.

NVD Description

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

In xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.

CVSS Base Scores

version 3.1