CVE-2026-76898 draw.io: Unauthenticated SSRF via IPv6 ULA blocklist bypass in /embed2.js

draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.3.8, src/main/java/com/mxgraph/online/Utils.java checks IPv6 Unique Local Addresses in Utils.sanitizeUrl by comparing the text prefixes fc00:: and fd00::, but the JDK returns the expanded address form, so the...

CVE-2026-76898

draw.io prior to version 30.3.8 is vulnerable to an unauthenticated SSRF via an IPv6 ULA blocklist bypass in /embed2.js. The root cause is in Utils.sanitizeUrl(), which checks for IPv6 ULA addresses by comparing the literal text prefixes fc00:: and fd00::, but the JDK returns the expanded address...