Incorrect Calculation of Buffer Size Affecting expat-static package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.09% (1st percentile)

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  • Snyk IDSNYK-RHEL7-EXPATSTATIC-17651482
  • published27 Jun 2026
  • disclosed19 Jun 2026

Introduced: 19 Jun 2026

NewCVE-2026-56132  (opens in a new tab)
CWE-131  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 expat-static.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat-static package and not the expat-static package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

CVSS Base Scores

version 3.1