CVE-2026-106106 Quasar Framework - Stored XSS & Information Disclosure

Quasar Framework prior to @quasar/render-ssr-error 2.2.4 and @quasar/app-vite 3.3.0 contains a stored XSS caused by improper escaping of diagnostic data in renderSSRError(), letting network-adjacent attackers execute script in developer browsers and access environment secrets, exploit requires attacker to reach SSR or SSG render failure on development server.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.28% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Client Script Exec, Information Disclosure
CVSS vector
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N/E:X/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
Published
6 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to @quasar/render-ssr-error 2.2.4 and @quasar/app-vite 3.3.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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