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

CVE-2026-59928

Published

2026-07-08T17:17:28Z

Modified

2026-08-27T23:06:29Z

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/block_parser.py and the ref_links environment dictionary handling, allowing denial of service through CPU exhaustion. This issue is fixed in version 3.3.0.

References

https://security-tracker.debian.org/tracker/CVE-2026-59928

Affected packages

Debian:13 / mistune

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown 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