CVE-2026-86435 — commonmark 1.5.0 before 2.8.4 Denial of Service via Footnote
commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Footnote extension that fails to deduplicate footnote definitions. Attackers can cra…
Published: 2026-09-07 · CVSS: 8.7 · CVSS 4.0
commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Footnote extension that fails to deduplicate footnote definitions. Attackers can craft documents with duplicate footnote definitions and references to create quadratic output expansion, consuming excessive memory and CPU to exhaust server resources.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7