DEBIAN-CVE-2026-115351

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Source
https://security-tracker.debian.org/tracker/CVE-2026-115351
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-115351.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-115351
Upstream
Published
2026-10-22T19:17:40Z
Modified
2026-10-23T18:05:11Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

Mistune from 3.2.1 before 3.3.0 contains a CSS injection vulnerability that allows attackers controlling markdown input to inject arbitrary style declarations via the unvalidated figwidth option of the figure directive. Attackers can append declarations like background:url() to the rendered figure style attribute, forcing victim browsers to send requests to attacker servers and leak attribute values.

References

Affected packages

Debian:12 / mistune

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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
3.3.4-1
3.4.0-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-115351.json"

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
3.3.4-1
3.4.0-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-115351.json"

Debian:14 / mistune

Package

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

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
3.3.4-1
3.4.0-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-115351.json"