CVE-2026-86435
Last modified
CVE-2026-86435 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| thephpleague | commonmark | >= 1.5.0, < 2.8.4 |
References
Timeline
- Published
- Last Modified
- Status
- Undergoing Analysis
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