CVE-2026-116020EUVD-2026-109278GHSA-M83H-JFMJ-P8JM
BookStack before 26.09.2 Incorrect Authorization via AttachmentController on Draft Pages
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 26.09.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
BookStack, a self-hosted wiki and documentation platform, is affected by this vulnerability. An authenticated user with attachment permissions could access, download, rename, relink, or replace attachments on other users' unpublished draft pages.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original 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permissions can enumerate sequential attachment IDs to download, rename, relink, or replace files on another user's unpublished draft pages.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- BookStackApp BookStack
fixed in 26.09.2