CVE-2026-116020

MediumCVSS 5.4/10Last modified Oct 24, 2026

Description

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permissions can enumerate sequential attachment IDs to download, rename, relink, or replace files on another user's unpublished draft pages.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-863

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
BookStackAppBookStack< 26.09.2

References

Timeline

Published
Oct 24, 2026
Last modified
Oct 24, 2026
NVD status
Received

Related CVEs from 2026

CVE-2026-116036.1The Product Filter Widget for Elementor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via 'args[filterFormArray]' ParCVE-2026-116046.5An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authentiCVE-2026-116057.5The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, evCVE-2026-116077.6Backend users with access to the Form Framework were able to use files not ending in .form.yaml as form definitions, which were processed wiCVE-2026-116086.1The WP Customer Reviews plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpcr3_fname' parameter in all versionsCVE-2026-11613.5A vulnerability was detected in pbrong hrms 1.0.1. The affected element is the function UpdateRecruitmentById of the file /handler/recruitmeCVE-2026-116108.8A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). After a successful SASL bind with integriCVE-2026-116116.5A flaw was found in 389 Directory Server. The Content Synchronization persistent search plugin allows unbounded memory growth when an authenCVE-2026-116139.8The Divi Ajax Filter plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 5.1.2 via the 'custom_CVE-2026-116146.4The Xpro Addons — 140+ Widgets for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_attributes' pCVE-2026-116168.8The Events Calendar for GeoDirectory plugin for WordPress is vulnerable to Privilege Escalation in versions up to and including 2.3.28. ThisCVE-2026-116173.1Tanium addressed a compression bomb vulnerability in Findings.