DEBIAN-CVE-2026-59928

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Source
https://security-tracker.debian.org/tracker/CVE-2026-59928
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59928.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-59928
Upstream
Published
2026-07-08T17:17:28.600Z
Modified
2026-07-09T09:00:33.389240253Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a Markdown document containing many repeated or distinct reference-link definitions causes quadratic work in src/mistune/blockparser.py and the reflinks environment dictionary handling, allowing denial of service through CPU exhaustion. 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/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59928.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/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59928.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/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59928.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/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59928.json"