Description
libnxml before 0.18.6 contains a stack-based buffer overflow vulnerability in src/nxml_parser.c that allows remote attackers to write past a 1024-byte stack buffer via long XML names. Attackers can supply XML or RSS feeds with a 1022-character element, attribute, DOCTYPE or entity name ending in a multi-byte UTF-8 character to crash parsing applications.
Published: 2026-11-05
Score: 8.7 High
EPSS: n/a
KEV: No
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Remediation

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Advisories

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History

Thu, 05 Nov 2026 18:30:00 +0000

Type Values Removed Values Added
Description libnxml before 0.18.6 contains a stack-based buffer overflow vulnerability in src/nxml_parser.c that allows remote attackers to write past a 1024-byte stack buffer via long XML names. Attackers can supply XML or RSS feeds with a 1022-character element, attribute, DOCTYPE or entity name ending in a multi-byte UTF-8 character to crash parsing applications.
Title libnxml before 0.18.6 Stack-based Buffer Overflow via long multi-byte XML name
Weaknesses CWE-121
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-05T19:04:52.864Z

Reserved: 2026-11-05T17:58:50.610Z

Link: CVE-2026-123202

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-05T19:17:19.337

Modified: 2026-11-05T19:17:19.337

Link: CVE-2026-123202

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-05T20:00:09Z

Weaknesses