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.
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History
Wed, 28 Oct 2026 02:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | libexpat through 2.9.0 NULL Pointer Dereference via External Entity Subparser | |
| First Time appeared |
Libexpat Project
Libexpat Project libexpat |
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| Weaknesses | CWE-476 | |
| CPEs | cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Libexpat Project
Libexpat Project libexpat |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-28T02:03:18.766Z
Reserved: 2026-10-27T13:04:09.906Z
Link: CVE-2026-117610
No data.
Status : Received
Published: 2026-10-28T03:17:12.777
Modified: 2026-10-28T03:17:12.777
Link: CVE-2026-117610
No data.
OpenCVE Enrichment
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Weaknesses