CVE-2026-84695 | BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64 content and stores it without content inspection. Attackers with editor permissions can upload SVG files containing scripts that execute in administrator browsers when accessed through the image gallery API without content-type validation or CSP headers.
BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64 content and stores it without content inspection. Attackers with editor permissions can upload SVG files containing scripts that execute in administrator browsers when accessed through the image gallery API without content-type validation or CSP headers.
- 🔗 github.com/BookStackApp/BookStack
- 🔗 github.com/BookStackApp/BookStack/commit/ac0348a79f3…
- 🔗 github.com/BookStackApp/BookStack/blob/v26.05.3/app/…
- 🔗 github.com/BookStackApp/BookStack/releases/tag/v26.0…
- 🔗 www.bookstackapp.com/blog/bookstack-release-v26-05-4/
- 🔗 www.vulncheck.com/advisories/bookstack-before-26.05.4-store…
```Code``` unterstützt. Zero-Day & Vulnerability Intelligence Hub
Echtzeit-Tracking mit EPSS Exploit-Wahrscheinlichkeiten, Angriffsvektor-Decodern und KI-Patch-Anleitungen.
📊 Historien-Charts — Criticals-Trend · Vendors · EPSS-Verteilung
| Tier | 2026-09-22 | 2026-10-06 |
|---|---|---|
| ≥90 % | 491 | 353 |
| ≥50 % | 1475 | 1077 |
| ≥10 % | 0 | 2 |
| <10 % | 0 | 535 |
CVE-2026-84695 | BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64 content and stores it without content inspection. Attackers with editor permissions can upload SVG files containing scripts that execute in administrator browsers when accessed through the image gallery API without content-type validation or CSP headers.
BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64 content and stores it without content inspection. Attackers with editor permissions can upload SVG
Noch keine Analyse zu CVE-2026-84695
Sei der Erste: Einschätzung, Betroffenheit, Workaround oder PoC — mit Antworten im Thread.