DEBIAN-CVE-2026-59923

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Source
https://security-tracker.debian.org/tracker/CVE-2026-59923
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59923.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-59923
Upstream
Published
2026-07-08T17:17:27.910Z
Modified
2026-07-09T09:00:20.583563315Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, HTMLRenderer.safe_url() does not block percent-encoded javascript URIs, allowing attacker-supplied Markdown links or images to bypass URL protections and execute script in rendered HTML. This issue is fixed in version 3.3.0.

References

Affected packages

Debian:11 / mistune

Package

Name
mistune
Purl
pkg:deb/debian/mistune?arch=source&distro=bullseye

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.8.4-4
0.8.4-5
2.*
2.0.0~rc1-1~exp1
2.0.0-1
2.0.0-1+really0.8.4-1
2.0.0.0+really2.0.0-1~exp1
2.0.0.0+really2.0.0-1
2.0.2-1
2.0.3-1
2.0.4-1
2.0.4-2
3.*
3.0.2-1
3.0.2-2
3.1.3-1
3.1.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59923.json"

Debian:12 / mistune

Package

Name
mistune
Purl
pkg:deb/debian/mistune?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.0.4-1
2.0.4-2
3.*
3.0.2-1
3.0.2-2
3.1.3-1
3.1.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59923.json"

Debian:13 / mistune

Package

Name
mistune
Purl
pkg:deb/debian/mistune?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.3-1
3.1.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59923.json"

Debian:14 / mistune

Package

Name
mistune
Purl
pkg:deb/debian/mistune?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.3-1
3.1.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59923.json"