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CVE-2026-59924— Mistune: Arbitrary File Read via Include directive path traversal

CVSS 5.9 · Medium EPSS 0.40% · P33

Affected Version Matrix 1

VendorProductVersion RangeStatus
lepturemistune< 3.3.0affected
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I. Basic Information for CVE-2026-59924

Vulnerability Information
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Vulnerability Title
Mistune: Arbitrary File Read via Include directive path traversal
Source: CVE Program / CVE List V5
Vulnerability Description
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, Include.parse() joins and normalizes user-supplied include paths without verifying that the result remains within the intended markdown directory, allowing crafted include paths to access files outside that directory when markdown files are processed using md.read(). This issue is fixed in version 3.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Hsiaoming Yang mistune 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hsiaoming Yang mistune是日本Hsiaoming Yang个人开发者的一个快速、可扩展的Markdown解析器。 Hsiaoming Yang mistune 3.3.0之前版本存在路径遍历漏洞，该漏洞源于Include.parse()在拼接和规范化用户提供的include路径时未验证结果是否仍在预期markdown目录内，导致使用md.read()处理markdown文件时，特制的include路径可访问该目录之外的文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
lepturemistune < 3.3.0 -

II. Public POCs for CVE-2026-59924

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III. Intelligence Information for CVE-2026-59924

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Patches & Fixes for CVE-2026-59924 (1)

Vendor Advisories for CVE-2026-59924 (1)

Vendor Pages for CVE-2026-59924 (1)

Same Patch Batch · lepture · 2026-07-08 · 9 CVEs total

CVE-2026-599227.5 HIGHMistune plugins/formatting: quadratic-time parsing on long runs of `~~x~~`, `==x==`, and `
CVE-2026-599257.5 HIGHinline_parser: quadratic-time parsing on long runs of `**x**` and `***x***` emphasis pairs
CVE-2026-599287.5 HIGHMistune block_parser: quadratic-time parsing on long lists of repeated reference-link defi
CVE-2026-599236.1 MEDIUMMistune: XSS via percent-encoded javascript URI bypass in safe_url()
CVE-2026-599296.1 MEDIUMMistune renderers/html.safe_url: HARMFUL_PROTOCOLS list misses legacy and chained schemes
CVE-2026-599275.3 MEDIUMMistune directives/include: mutual `.. include::` recursion crashes the renderer with `Rec
CVE-2026-599304.3 MEDIUMMistune toc / TableOfContents directive: heading IDs use predictable `toc_N` numbering wit
CVE-2026-59926Mistune: XSS via unescaped class option in Admonition directive

IV. Related Vulnerabilities

Same product: mistune
Same vendor: lepture
Same weakness: CWE-22

V. Comments for CVE-2026-59924

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