CVE-2026-5484

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Source
https://cve.org/CVERecord?id=CVE-2026-5484
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5484.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-5484
Published
2026-04-03T19:45:12.967Z
Modified
2026-08-04T11:50:07.682249182Z
Severity
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
BookStackApp BookStack Chapter Export ExportFormatter.php chapterToMarkdown access control
Details

A weakness has been identified in BookStackApp BookStack up to 26.03. Affected is the function chapterToMarkdown of the file app/Exports/ExportFormatter.php of the component Chapter Export Handler. Executing a manipulation of the argument pages can lead to improper access controls. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 26.03.1 is able to address this issue. This patch is called 8a59895ba063040cc8dafd82e94024c406df3d04. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5484.json",
    "cna_assigner": "VulDB",
    "cwe_ids": [
        "CWE-266",
        "CWE-284"
    ]
}
References

Affected packages

Git / github.com/bookstackapp/bookstack

Affected ranges

Type
GIT
Repo
https://github.com/bookstackapp/bookstack
Events
Introduced
33d2eee4b268dc9688f53da9575a4126b5262402
Last affected
33d2eee4b268dc9688f53da9575a4126b5262402
Database specific 
{
    "extracted_events": [
        {
            "introduced": "26.03"
        },
        {
            "last_affected": "26.03"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

26.*
26.03
v26.*
v26.03

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5484.json"