CVE-2026-56408: Integer Overflow
Published Jun 21, 2026
·Updated
libexpat before 2.8.2 has an integer overflow in copyString.
Affected Software
2 affected components
Expat libexpat<2.8.2
Libexpat Project Libexpat<2.8.2
Remediation
Event History
Jun 21, 2026
CVE Published
via MITRE·03:51 PM
Data Sourced
via MITRE·03:51 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·04:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-56408?
CVE-2026-56408 has a medium severity rating of 6.9.
2
What type of vulnerability is CVE-2026-56408?
CVE-2026-56408 is classified as an integer overflow vulnerability.
3
How does CVE-2026-56408 affect the Expat library?
CVE-2026-56408 can lead to potential memory corruption due to an integer overflow in the copyString function.
4
How do I fix CVE-2026-56408?
To fix CVE-2026-56408, upgrade to Expat version 2.8.2 or later where the vulnerability has been addressed.
5
Which software is impacted by CVE-2026-56408?
CVE-2026-56408 impacts the Expat library, specifically versions prior to 2.8.2.