MEDIUM 4.3 Microsoft
CVE-2026-59930
Mistune toc / TableOfContents directive: heading IDs use predictable `toc_N` numbering with no slugification, allowing collision with attacker-controlled `id="toc_N"` content
Microsoft Security Update 2026-Jul: Mistune toc / TableOfContents directive: heading IDs use predictable `toc_N` numbering with no slugification, allowing collision with attacker-controlled `id="toc_N"` content
Affected Products
- azl3 python-mistune 3.3.0-1 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59930
- https://nvd.nist.gov/vuln/detail/CVE-2026-59930
This medium severity vulnerability with a CVSS score of 4.3 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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