UBUNTU-CVE-2026-48822

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Source
https://ubuntu.com/security/CVE-2026-48822
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48822.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-48822
Upstream
Published
2026-06-17T20:17:00Z
Modified
2026-06-24T11:01:45Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Shaarli is a personal bookmarking service. Versions 0.16.1 and prior contain a stored Cross-Site Scripting (XSS) vulnerability in the Markdown-to-HTML conversion process used in the Bookmark Description field. An authenticated user can inject a malicious javascript: URI inside a Markdown link. The vulnerability originates in the filterProtocols method within BookmarkMarkdownFormatter.php.This method attempts to sanitize Markdown links by filtering dangerous protocols (such as javascript:) before rendering. It uses the following regular expression: (#]((.*?))#is). This regex is designed to detect inline Markdown links, but it fails to detect Markdown reference-style links because reference-style links are resolved by the Markdown parser after preprocessing. The filterProtocols method never inspects the actual URL used in these references and as a result, an attacker can supply a javascript: URI inside a reference definition. This issue has been fixed in version 0.16.2.

References

Affected packages

Ubuntu:16.04:LTS / shaarli

Package

Name
shaarli
Purl
pkg:deb/ubuntu/shaarli?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*
0.0.42~beta~dfsg1-2
0.0.42~beta~dfsg1-2ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "shaarli",
            "binary_version": "0.0.42~beta~dfsg1-2ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48822.json"