Name: CVE-2026-86142: Heap-based Buffer Overflow
Creator: Rapid7
Published: 2026-09-05T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-86142, CWE-122, CVSS 7.8, EPSS 0.00132

In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.

CVSS Details

CVSS 3.1 Base Score: 7.8
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alma_linux	—	Upgrade python3-libxml2Upgrade libxml2Upgrade libxml2-devel	Oct 11, 2026	Sep 24, 2026
Amazon_linux_2023	—	Upgrade libxml2-staticUpgrade python3-libxml2Upgrade libxml2Upgrade python3-libxml2-debuginfoUpgrade libxml2-debugsourceUpgrade libxml2-debuginfoUpgrade libxml2-devel	Sep 30, 2026	Sep 5, 2026
Redhat_linux	—	Upgrade python3-libxml2-debuginfoUpgrade libxml2-staticUpgrade python3-libxml2No solution existsUpgrade libxml2-debugsourceUpgrade libxml2-develUpgrade libxml2Upgrade libxml2-debuginfo	Sep 10, 2026	Sep 5, 2026
Rocky_linux	—	Upgrade python3-libxml2Upgrade libxml2Upgrade libxml2-debugsourceUpgrade python3-libxml2-debuginfoUpgrade libxml2-develUpgrade libxml2-staticUpgrade libxml2-debuginfo	Sep 28, 2026	Sep 25, 2026
Ubuntu	—	Upgrade libxml2 (Ubuntu Pro)Upgrade libxml2-16Upgrade libxml2-dev (Ubuntu Pro)Upgrade libxml2-devUpgrade libxml2Upgrade libxml2-source	Oct 12, 2026	Oct 8, 2026
Vmware Photon_os	—	Use 'tdnf update' to upgrade all packages to the latest version.	Sep 21, 2026	Sep 5, 2026

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CVSS Details

Covered by Rapid7

Prioritise with Active Threat Intelligence