Mistune before 3.3.0 Arbitrary Local File Read via Include Directive
Impact
Mistune before 3.3.0 has a path traversal vulnerability in the Include directive, allowing local file reads. Attackers can disclose files like /etc/passwd by submitting Markdown.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Affected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
lepture · VulnCheck
mistune
2 ranges
lepture · VulnCheck
mistune
Package identity
pkg:pypi/mistuneExplore mistune →Identity supplied by VulnCheck. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
0 → before 3.3.0
semver versions
unaffected
3.3.0
semver versions
Other versions: unaffected
Original source description
Mistune before 3.3.0 contains a path traversal vulnerability in the opt-in Include directive that allows attackers to read local files by supplying relative or absolute include paths. Attackers who submit Markdown rendered via Markdown.read() can disclose files such as /etc/passwd and inject unescaped HTML or script content into rendered output.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-115354View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
VulnCheck · platform conditions
Any condition may hold
Vulnerable product
cpe:2.3:a:mistune_project:mistune:*:*:*:*:*:*:*:*Before: 3.3.0
Original applicability statements
[
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:mistune_project:mistune:*:*:*:*:*:*:*:*",
"versionEndExcluding": "3.3.0"
}
]
}
]
}
]Contributing organizations · 2
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What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.