UBUNTU-CVE-2026-48988

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-48988
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48988.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-48988
Upstream
Published
2026-06-17T21:16:00Z
Modified
2026-06-24T11:01:07.279146473Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

markdown-it is a Markdown parser. Versions 14.1.1 and below contain a denial-of-service vulnerability when typographer: true is enabled, due to quadratic (O(n^2)) processing in the smartquotes rule. The issue stems from repeatedly modifying strings with replaceAt(), which performs O(n) slicing and concatenation per quote character. This can cause excessive CPU consumption when parsing quote-heavy, user-supplied markdown and may let attackers degrade or disrupt service availability. Although typographer is disabled by default, many production apps enable it for smart typography, making the issue relevant. This issue has been fixed in version 14.2.0.

References

Affected packages

Ubuntu:22.04:LTS / node-markdown-it

Package

Name
node-markdown-it
Purl
pkg:deb/ubuntu/node-markdown-it?arch=source&distro=jammy

Affected ranges

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

Affected versions

10.*
10.0.0+dfsg-2
10.0.0+dfsg-3
10.0.0+dfsg-3.1
10.0.0+dfsg-4
10.0.0+dfsg-5
10.0.0+dfsg-6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-markdown-it",
            "binary_version": "10.0.0+dfsg-6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48988.json"

Ubuntu:24.04:LTS / node-markdown-it

Package

Name
node-markdown-it
Purl
pkg:deb/ubuntu/node-markdown-it?arch=source&distro=noble

Affected ranges

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

Affected versions

22.*
22.2.3+dfsg+~12.2.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-markdown-it",
            "binary_version": "22.2.3+dfsg+~12.2.3-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48988.json"

Ubuntu:25.10 / node-markdown-it

Package

Name
node-markdown-it
Purl
pkg:deb/ubuntu/node-markdown-it?arch=source&distro=questing

Affected ranges

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

Affected versions

22.*
22.2.3+dfsg+~12.2.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-markdown-it",
            "binary_version": "22.2.3+dfsg+~12.2.3-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48988.json"

Ubuntu:26.04:LTS / node-markdown-it

Package

Name
node-markdown-it
Purl
pkg:deb/ubuntu/node-markdown-it?arch=source&distro=resolute

Affected ranges

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

Affected versions

22.*
22.2.3+dfsg+~12.2.3-2
22.2.3+dfsg+~12.2.3-4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-markdown-it",
            "binary_version": "22.2.3+dfsg+~12.2.3-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48988.json"