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2.9Low

CVE-2026-86137

xmlsoft libxml2 Published: 2026-09-05 07:19 (2 months ago)

Description

In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.

Weakness (CWE): CWE-125

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

https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4 Release Notes
https://github.com/GNOME/libxml2/commit/76fe08d97de88bfaef2f7d5cd27f11954cc5bee2 Patch
https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1099 ExploitVendor Advisory

CPE matches (NVD) (1)

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

CVSS score

2.9Low

Source: mitre · CVSS 3.1

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

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

All scores (3)

cna	CVSS 3.1	2.9Low
cve@mitre.org	CVSS 3.1	2.9Low
nvd	CVSS 3.1	6.1Medium

EPSS (chance of exploitation in 30 days)

0.19%

higher than 9% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: partial

Timeline

ID reserved2026-09-05
Published2026-09-05 07:19
Reached IP-DB2026-10-24 23:50
Last updated2026-09-15 22:46

Assigned by (CNA): mitre
NVD status: Analyzed

View at source: CVE.org · NVD

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