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CVE-2026-115353

Mistune before 3.3.0 Path Traversal via include Directive

HIGH
8.6
CVSS Score
Published: October 22, 2026 at 07:13 PM UTC
Updated: October 22, 2026 at 07:17 PM UTC
1 product affected across 1 vendorProject Mistune

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Severity
HIGH8.6
Exploit prediction
EPSS 0.4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Project Mistune· Lepture
90%
All versions
Vendor states this is fixed in 3.3.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/lepture/mistune/security/advisories/GHSA-9jjx-3hq3-hx4j
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/mistune-before-3.3.0-path-traversal-via-include-directive

CVSS

8.6HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-22

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