HIGH 7.5 Microsoft
CVE-2026-59922
Mistune plugins/formatting: quadratic-time parsing on long runs of `~~x~~`, `==x==`, and `^^x^^` markers (strikethrough / mark / insert)
Microsoft Security Update 2026-Jul: Mistune plugins/formatting: quadratic-time parsing on long runs of `~~x~~`, `==x==`, and `^^x^^` markers (strikethrough / mark / insert)
Affected Products
- azl3 python-mistune 3.3.0-1 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59922
- https://nvd.nist.gov/vuln/detail/CVE-2026-59922
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-07-14 via Microsoft. Affected: azl3 python-mistune 3.3.0-1 on Azure Linux 3.0.
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