CVE-2025-9670 – Mixmark-io Turndown Regular Expression Denial of Service (ReDoS)

CVE ID : CVE-2025-9670

Published : Aug. 29, 2025, 7:15 p.m. | 1 hour, 36 minutes ago

Description : A security flaw has been discovered in mixmark-io turndown up to 7.2.1. This affects an unknown function of the file src/commonmark-rules.js. Performing manipulation results in inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been released to the public and may be exploited.

Severity: 5.5 | MEDIUM

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