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.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Mon, 07 Sep 2026 13:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | commonmark 1.5.0 before 2.8.4 Denial of Service via Footnote | |
| First Time appeared |
Thephpleague
Thephpleague commonmark |
|
| Weaknesses | CWE-407 | |
| CPEs | cpe:2.3:a:thephpleague:commonmark:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Thephpleague
Thephpleague commonmark |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-09-07T12:53:53.897Z
Reserved: 2026-09-07T12:34:31.457Z
Link: CVE-2026-86435
No data.
Status : Received
Published: 2026-09-07T13:20:43.013
Modified: 2026-09-07T13:20:43.013
Link: CVE-2026-86435
No data.
OpenCVE Enrichment
No data.
Weaknesses