Vulnerability/
https://seclists.org/oss-sec/2026/q4/55

https://seclists.org/oss-sec/2026/q4/55: libexpat 2.9.0 fixes two vulnerabilities

Q: Which environments are affected by the integer overflow issue?

The integer overflow in expat_realloc, tracked as CVE-2026-102633, affects 32-bit platforms.

Q: What condition is addressed by the XML_ParseBuffer fix?

CVE-2026-77214 addresses XML_ParseBuffer failing to validate its len parameter against the available buffer capacity.

Q: Which release contains fixes for both issues?

Both CVE-2026-77214 and CVE-2026-102633 are fixed in libexpat 2.9.0.

Published Oct 5, 2026

Updated

Affected Software

1 affected component

Expat Expat<2.9.0

Frequently Asked Questions

Which environments are affected by the integer overflow issue?

The integer overflow in expat_realloc, tracked as CVE-2026-102633, affects 32-bit platforms.

What condition is addressed by the XML_ParseBuffer fix?

CVE-2026-77214 addresses XML_ParseBuffer failing to validate its len parameter against the available buffer capacity.

Which release contains fixes for both issues?

Both CVE-2026-77214 and CVE-2026-102633 are fixed in libexpat 2.9.0.

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