P4Verified

CVE-2026-86433: commonmark 1.5.0 to before 2.8.4

CVE-2026-86433. CVSS 3.1 base score 7.5 (HIGH, Vendor/CNA). EPSS 0.00509 (percentile 0.41481), scored 2026-10-06.

Affected technology

commonmark · 1.5.0 to before 2.8.4
thephpleague

Description’s affected range: versions from 1.5.0 before 2.8.4

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

The source reports that an attacker could disrupt service. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 2026-10-08 17:34:54.129727+00:00

CWE: CWE-407
CCR priority: 30.1 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
EPSS: 0.00509 · percentile 0.41592 · 2026-10-08
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-08 17:36:22.845483+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-08 17:32:11.049884+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-86433.html