Buffer Over-read Affecting expat package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.25% (17th percentile)

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  • Snyk IDSNYK-DEBIAN13-EXPAT-22281457
  • published8 Nov 2026
  • disclosed7 Nov 2026

Introduced: 7 Nov 2026

NewCVE-2026-124317  (opens in a new tab)
CWE-126  (opens in a new tab)

How to fix?

There is no fixed version for Debian:13 expat.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

libexpat through 2.10.0 contains an out-of-bounds read vulnerability in unknown_toUtf8() and unknown_toUtf16() in xmltok.c when handling application-registered unknown encodings. Attackers can supply a document ending in a truncated multibyte sequence so the convert callback reads past the parse buffer, leaking adjacent memory or crashing applications.

CVSS Base Scores

version 3.1