CVE-2026-0396: HTML injection in the web dashboard
An attacker might be able to inject HTML content into the internal web dashboard by sending crafted DNS queries to a DNSdist instance where domain-based dynamic rules have been enabled via either DynBlockRulesGroup:setSuffixMatchRule or DynBlockRulesGroup:setSuffixMatchRuleFFI.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-0396?
The severity of CVE-2026-0396 is considered to be high due to the potential for HTML injection into the web dashboard.
How do I fix CVE-2026-0396?
To fix CVE-2026-0396, ensure that domain-based dynamic rules are properly configured and apply the latest patches provided by PowerDNS.
What software is affected by CVE-2026-0396?
CVE-2026-0396 affects the PowerDNS DNSdist application.
What to do if CVE-2026-0396 is exploited?
If CVE-2026-0396 is exploited, review the impacted systems for unauthorized changes and apply security controls to prevent further incidents.
Are there any workarounds for CVE-2026-0396?
A workaround for CVE-2026-0396 includes disabling the domain-based dynamic rules if they are not needed.