Bug 2562702 - CVE-2026-115353 python-mistune: Mistune before 3.3.0 Path Traversal via include Directive [fedora-43]
Summary: CVE-2026-115353 python-mistune: Mistune before 3.3.0 Path Traversal via inclu...
Keywords:
Status: ON_QA
Alias: None
Product: Fedora
Classification: Fedora
Component: python-mistune
Version: 43
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Miro Hrončok
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["ae375ef1-20c6-4c6d-9672-2...
Depends On:
Blocks: CVE-2026-115353
TreeView+ depends on / blocked
 
Reported: 2026-10-28 10:52 UTC by Samuele Negrini
Modified: 2026-10-29 02:21 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Samuele Negrini 2026-10-28 10:52:58 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.

Comment 1 Fedora Update System 2026-10-28 12:00:31 UTC
FEDORA-2026-340793a2f1 (python-mistune-3.3.4-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-340793a2f1

Comment 2 Fedora Update System 2026-10-29 02:21:35 UTC
FEDORA-2026-340793a2f1 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-340793a2f1`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-340793a2f1

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.


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