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8.0High

CVE-2026-86140

xmlsoft libxml2 Published: 2026-09-05 07:26 (2 months ago)

Description

In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.

Weakness (CWE): CWE-121

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
xmlsoft	libxml2	< 2.15.4

References and patches

CPE matches (NVD) (1)

cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:* < 2.15.4

CVSS score

8.0High

Source: mitre · CVSS 3.1

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: Low

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

All scores (3)

cna	CVSS 3.1	8.0High
cve@mitre.org	CVSS 3.1	8.0High
nvd	CVSS 3.1	7.8High

EPSS (chance of exploitation in 30 days)

0.16%

higher than 5% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: total

Timeline

ID reserved2026-09-05
Published2026-09-05 07:26
Reached IP-DB2026-10-24 23:50
Last updated2026-09-15 22:39

Assigned by (CNA): mitre
NVD status: Analyzed

View at source: CVE.org · NVD

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