CVE-2026-116020
mediumBookStack before 26.09.2 contains an incorrect authorization vulnerability in AttachmentController that allows authenticated users to access other users' draft…
BookStack before 26.09.2 contains an incorrect authorization vulnerability in AttachmentController that allows authenticated users to access other users' draft page attachments by ID. Attackers with attachment permissions can enumerate sequential attachment IDs to download, rename, relink, or replace files on another user's unpublished draft pages.
CVSS
5.4
5.4 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-10-24 12:16
Modified: 2026-10-26 18:39
NVD status: Awaiting Analysis
Last synced 2 days ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://codeberg.org/bookstack/bookstack/commit/fcadecccda706b4ecaf9ac3f8e27defe0ebe78ae disclosure@vulncheck.com
- https://codeberg.org/bookstack/bookstack/releases/tag/v26.09.2 disclosure@vulncheck.com
- https://codeberg.org/bookstack/bookstack/src/tag/v26.09.1/app/Uploads/Controllers/Attachme... disclosure@vulncheck.com
- https://www.bookstackapp.com/blog/bookstack-release-v26-09-2/ disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/bookstack-before-26.09.2-incorrect-authorization-via-... disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗