Patch Forecast
Amber warning
Patch this week.

CVE-2026-115353

Mistune before 3.3.0 contains a path traversal vulnerability in the RST include directive that…

Risk score
63/100
CVSS
8.6 v3.1
Exploit chance (30 days)
0.4%
Published
22 Oct 2026

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What to know

What it is
Mistune before 3.3.0 contains a path traversal vulnerability in the RST include directive that allows attackers to read arbitrary files by supplying relative or absolute paths. Attackers can submit markdown containing include directives referencing ../ sequences or absolute paths to embed sensitive files like credenti…
Affected
See advisory
Fix
Upgrade the product to 3.3.0 or later.
Exploitation
No known exploitation

Why it is Amber

  • CVSS 8.6 high
  • Remotely exploitable without logging in

References

Original description

Mistune before 3.3.0 contains a path traversal vulnerability in the RST include directive that allows attackers to read arbitrary files by supplying relative or absolute paths. Attackers can submit markdown containing include directives referencing ../ sequences or absolute paths to embed sensitive files like credentials or environment data in rendered HTML.

Last activity 22 Oct 2026. Patch Forecast updates every hour.