UBUNTU-CVE-2026-4833

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Source

https://ubuntu.com/security/CVE-2026-4833

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4833.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-4833

Upstream

CVE-2026-4833

Published

2026-03-27T00:00:00Z

Modified

2026-03-27T15:43:43.364678Z

Severity

3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
1.9 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

A weakness has been identified in Orc discount up to 3.0.1.2. This issue affects the function compile of the file markdown.c of the component Markdown Handler. This manipulation causes uncontrolled recursion. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The project maintainer confirms: "[I]f you feed it an infinitely deep blockquote input it will crash. (...) [T]his is a duplicate of an old bug that I've been working on."

References

Affected packages

Ubuntu:16.04:LTS

discount

Package

Name: discount
Purl: pkg:deb/ubuntu/discount@2.1.8-2?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.1.8-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "discount",
            "binary_version": "2.1.8-2"
        },
        {
            "binary_name": "libmarkdown2",
            "binary_version": "2.1.8-2"
        },
        {
            "binary_name": "libmarkdown2-dev",
            "binary_version": "2.1.8-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4833.json"

Ubuntu:18.04:LTS

discount

Package

Name: discount
Purl: pkg:deb/ubuntu/discount@2.2.3b8-2?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.1.8-2

2.2.3b8-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "discount",
            "binary_version": "2.2.3b8-2"
        },
        {
            "binary_name": "libmarkdown2",
            "binary_version": "2.2.3b8-2"
        },
        {
            "binary_name": "libmarkdown2-dev",
            "binary_version": "2.2.3b8-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4833.json"

Ubuntu:20.04:LTS

discount

Package

Name: discount
Purl: pkg:deb/ubuntu/discount@2.2.6-1?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.6-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "discount",
            "binary_version": "2.2.6-1"
        },
        {
            "binary_name": "libmarkdown2",
            "binary_version": "2.2.6-1"
        },
        {
            "binary_name": "libmarkdown2-dev",
            "binary_version": "2.2.6-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4833.json"

Ubuntu:22.04:LTS

discount

Package

Name: discount
Purl: pkg:deb/ubuntu/discount@2.2.7-2?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.6-1ubuntu2

2.2.7-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "discount",
            "binary_version": "2.2.7-2"
        },
        {
            "binary_name": "libmarkdown2",
            "binary_version": "2.2.7-2"
        },
        {
            "binary_name": "libmarkdown2-dev",
            "binary_version": "2.2.7-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4833.json"

Ubuntu:24.04:LTS

discount

Package

Name: discount
Purl: pkg:deb/ubuntu/discount@2.2.7-2build1?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.7-2

2.2.7-2build1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "discount",
            "binary_version": "2.2.7-2build1"
        },
        {
            "binary_name": "libmarkdown2",
            "binary_version": "2.2.7-2build1"
        },
        {
            "binary_name": "libmarkdown2-dev",
            "binary_version": "2.2.7-2build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4833.json"

Ubuntu:25.10

discount

Package

Name: discount
Purl: pkg:deb/ubuntu/discount@2.2.7-2.1?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.2.7-2.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "discount",
            "binary_version": "2.2.7-2.1"
        },
        {
            "binary_name": "libmarkdown2",
            "binary_version": "2.2.7-2.1"
        },
        {
            "binary_name": "libmarkdown2-dev",
            "binary_version": "2.2.7-2.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4833.json"