CVE-2026-117610

HighCVSS 7.5/10Last modified Nov 5, 2026

Description

libexpat through 2.9.0 contains a NULL pointer dereference vulnerability in externalEntityInitProcessor2() in lib/xmlparse.c that mishandles the XML_TOK_NONE token from empty input. Attackers who control stream chunking can force an empty non-final first parse on an external entity subparser, causing a later parse to crash the application.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
libexpatlibexpat<= 2.9.0

References

Timeline

Published
Oct 28, 2026
Last modified
Nov 5, 2026
NVD status
Analyzed

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CVE-2026-117610: High severity, CVSS 7.5 | Vulnix