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CVE-2026-115353 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CNA: [email protected]CVSS-B:8.6 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/lepture/mistune/security/advisories/GHSA-9jjx-3hq3-hx4j	CISA-ADP	AdvisoryTechnical AnalysisVendor
https://github.com/lepture/mistune/security/advisories/GHSA-9jjx-3hq3-hx4j	[email protected]	AdvisoryTechnical AnalysisVendor
https://www.vulncheck.com/advisories/mistune-before-3.3.0-path-traversal-via-include-directive	[email protected]	AdvisoryVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')	[email protected]

Affected Products

Product	Versions
Mistune	<= 3.2.1 (semver)
CPE cpe:2.3:a:mistune_project:mistune:::::::: Remediation Upgrade: 3.3.0moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 4, 2026	CVE Modified	CISA-ADP
Oct 22, 2026	New CVE Received	[email protected]