CVE-2026-116020— BookStack before 26.09.2 Incorrect Authorization via AttachmentController on Draft Pages
Quick assessment
Affected
BookStackApp BookStack
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
BookStack 26.09.2 之前的版本在 AttachmentController 中存在一个授权错误漏洞，允许已认证用户通过附件 ID 访问其他用户的草稿页面附件。拥有附件权限的攻击者可以通过枚举连续的附件 ID，下载、重命名、重新关联或替换其他用户未发布草稿页面上的文件。
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-116020
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
BookStack before 26.09.2 Incorrect Authorization via AttachmentController on Draft Pages
Source: CVE Program / CVE List V5
Vulnerability 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permissions can enumerate sequential attachment IDs to download, rename, relink, or replace files on another user's unpublished draft pages.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| BookStackApp | BookStack | 0 ~ 26.09.2 | - |
|
II. Public POCs for CVE-2026-116020
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-116020
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-116020 (1)
Security Blog Posts for CVE-2026-116020 (1)
Other References for CVE-2026-116020 (3)
IV. Related Vulnerabilities
Same product: BookStack
-
CVE-2026-89022
BookStack < 26.05.5 Authentication Bypass via Social Login P -
CVE-2026-86285
BookStack Attachment Edit Endpoint AttachmentController.php -
CVE-2026-84695
BookStack before 26.05.4 Stored XSS via Drawing Upload -
CVE-2026-82450
BookStack before 26.05.4 Remote Code Execution via Book Cove -
CVE-2026-67204
BookStack < 26.05.4 Broken Access Control via Image Gallery
Same vendor: BookStackApp
-
CVE-2026-89022
BookStack < 26.05.5 Authentication Bypass via Social Login P -
CVE-2026-84695
BookStack before 26.05.4 Stored XSS via Drawing Upload -
CVE-2026-82450
BookStack before 26.05.4 Remote Code Execution via Book Cove -
CVE-2026-67204
BookStack < 26.05.4 Broken Access Control via Image Gallery -
CVE-2026-5484
BookStackApp BookStack Chapter Export ExportFormatter.php ch
Same weakness: CWE-863
-
CVE-2026-75525
OpenReception: unauthenticated ML-KEM key injection into the -
CVE-2026-112342
Tandoor Recipes < 2.7.0 Cross-Space Permission Cache Poisoni -
CVE-2026-114619
Authlib: OpenID implicit grant checks raw scope instead of a -
CVE-2026-115221
Ipa: freeipa: freeipa uses subject cn as proof of certificat -
CVE-2026-115509
Jitsu Console before 2.14.0-beta.41 Cross-Workspace Authoriz
V. Comments for CVE-2026-116020
No comments yet