CVE-2026-56410: Integer Overflow
Last updated 24 September 2026
Other sources
xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 2.8.2-1 - Upgrade
Upgrade
debian/expatto a version that resolves this vulnerability.Fixed in 2.5.0-1+deb12u3Fixed in 2.8.3-1~deb13u1Fixed in 2.8.4-1Fixed in 2.8.4-2 - Upgrade
Upgrade
libexpatto a version that resolves this vulnerability.Fixed in 2.8.2
Event History
Frequently Asked Questions
What is the severity of CVE-2026-56410?
The severity of CVE-2026-56410 is classified as medium with a score of 6.9.
What is CVE-2026-56410?
CVE-2026-56410 is an integer overflow vulnerability in the xmlwf tool of libexpat before version 2.8.2.
How do I fix CVE-2026-56410?
To fix CVE-2026-56410, you should upgrade libexpat to version 2.8.2 or later.
What software is affected by CVE-2026-56410?
The affected software includes libexpat versions prior to 2.8.2.
What is the impact of CVE-2026-56410?
The impact of CVE-2026-56410 involves potential security issues due to an integer overflow leading to vulnerability exploitation.