CVE-2026-5484 is a medium-severity improper access control vulnerability affecting BookStackApp BookStack versions up to 26.03, specifically within the Chapter Export Handler component. This flaw allows remote attackers to gain improper access by manipulating the `pages` argument in the `chapterToMarkdown` function. With a CVSS score of 5.3, it presents a low-complexity remote attack vector primarily impacting confidentiality. Although not currently observed in active exploitation and showing minimal community discussion, a public exploit has been released, making immediate upgrade to version 26.03.1 critical.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| BookStackApp | BookStack | 26.03CNA affected |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.