CVE-2026-86428 — commonmark 1.5.0 before 2.10.0 Denial of Service via Attributes
commonmark versions from 1.5.0 before 2.10.0 contain a denial of service vulnerability in the AttributesExtension when processing distinctly-named attributes. Attackers can subm…
Published: 2026-09-07 · CVSS: 8.7 · CVSS 4.0
commonmark versions from 1.5.0 before 2.10.0 contain a denial of service vulnerability in the AttributesExtension when processing distinctly-named attributes. Attackers can submit Markdown with numerous distinct attribute names to cause quadratic-time attribute merging and filtering, consuming disproportionate CPU resources and preventing legitimate requests from completing.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7