CVE-2025-9670

mixmark-io turndown commonmark-rules.js redos

CVSS 6.9 MEDIUMEPSS 0.5%CWE-1333 CWE-400

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

29 Aug 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Affected products

mixmark-io · turndown

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References

https://github.com/mixmark-io/turndown/issues/501 https://github.com/mixmark-io/turndown/issues/501#issue-3336342088 https://vuldb.com/?ctiid.321880 https://vuldb.com/?id.321880 https://vuldb.com/?submit.637911