GHSA-jgmr-x24h-q8jjHighCVSS 8.8
BookStack before 26.05.4 contains a remote code execution vulnerability in the portable ZIP...
🔗 CVE IDs covered (1)
📋 Description
BookStack before 26.05.4 contains a remote code execution vulnerability in the portable ZIP import functionality that allows users with Import Content and Create Books permissions to upload a PHP polyglot file as a book cover. Attackers can bypass image extension validation by embedding a PHP file with a .php filename in the ZIP archive, which is stored in the public web root and executed by unauthenticated requests.
🔗 References (5)
- https://nvd.nist.gov/vuln/detail/CVE-2026-82450
- https://github.com/BookStackApp/BookStack/commit/e210cc32e4cbb1efeae5c5c9d0fef8e3c6a752e6
- https://github.com/BookStackApp/BookStack
- https://www.vulncheck.com/advisories/bookstack-before-26.05.4-remote-code-execution-via-book-cover
- https://github.com/advisories/GHSA-jgmr-x24h-q8jj