Description
libexpat 2.7.2 through 2.9.0 contains a denial of service vulnerability because XML_ParserReset zeroes the direct byte count but never offsets tracked heap allocations. Attackers can submit a large XML document so later documents on the same reset parser fail with XML_ERROR_NO_MEMORY until it is recreated.
Published: 2026-10-20
Score: 8.2 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Tue, 20 Oct 2026 12:45:00 +0000

Type Values Removed Values Added
Description libexpat 2.7.2 through 2.9.0 contains a denial of service vulnerability because XML_ParserReset zeroes the direct byte count but never offsets tracked heap allocations. Attackers can submit a large XML document so later documents on the same reset parser fail with XML_ERROR_NO_MEMORY until it is recreated.
Title libexpat 2.7.2 through 2.9.0 Denial of Service via XML_ParserReset
First Time appeared Libexpat Project
Libexpat Project libexpat
Weaknesses CWE-909
CPEs cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
Vendors & Products Libexpat Project
Libexpat Project libexpat
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Libexpat Project Libexpat
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-20T11:24:06.634Z

Reserved: 2026-10-20T01:07:45.687Z

Link: CVE-2026-113351

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-20T11:17:19.363

Modified: 2026-10-20T11:17:19.363

Link: CVE-2026-113351

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses