DEBIAN-CVE-2026-71478

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Source
https://security-tracker.debian.org/tracker/CVE-2026-71478
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71478.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-71478
Upstream
Published
2026-08-06T22:18:31Z
Modified
2026-09-11T08:47:37Z
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

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 1.5.0 until 2.9.0, the AttributesExtension's href and src unsafe-link filter can be bypassed by embedding control bytes, such as a tab, carriage return, line feed, or leading C0 control character, in a javascript: URL that browsers discard before parsing the scheme, causing the browser to still execute the script even when the unsafe-link filter is enabled. This issue is fixed in 2.9.0.

References

Affected packages

Debian:12 / php-league-commonmark

Package

Name
php-league-commonmark
Purl
pkg:deb/debian/php-league-commonmark?arch=source&distro=bookworm

Affected ranges

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

Affected versions

2.*
2.3.9-1
2.3.9-1+deb12u1
2.4.0-1
2.4.1-1
2.4.2-1
2.4.2-2
2.5.0-1
2.5.1-1
2.5.3-1
2.6.0-1
2.6.1-1
2.6.1-2
2.6.2-1
2.7.0-1
2.7.1-1
2.7.1-2
2.8.0-1
2.8.1-1
2.8.2-1
2.8.2-2
2.8.3-1
2.9.0-1
2.10.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71478.json"

Debian:13 / php-league-commonmark

Package

Name
php-league-commonmark
Purl
pkg:deb/debian/php-league-commonmark?arch=source&distro=trixie

Affected ranges

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

Affected versions

2.*
2.7.0-1
2.7.0-1+deb13u1
2.7.1-1
2.7.1-2
2.8.0-1
2.8.1-1
2.8.2-1
2.8.2-2
2.8.3-1
2.9.0-1
2.10.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71478.json"

Debian:14 / php-league-commonmark

Package

Name
php-league-commonmark
Purl
pkg:deb/debian/php-league-commonmark?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.0-1

Affected versions

2.*
2.7.0-1
2.7.1-1
2.7.1-2
2.8.0-1
2.8.1-1
2.8.2-1
2.8.2-2
2.8.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71478.json"