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CVE-2026-86428

commonmark 1.5.0 before 2.10.0 Denial of Service via Attributes PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
thephpleague / commonmarkaffected 1.5.0 before 2.10.0; unaffected 2.10.0

CWE

CWE-407

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.