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
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No solution or workaround provided in the CVE record.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

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