CVE-2026-40208
Multiple security vulnerabilities were discovered in the dnsdist DNS loadbalancer, which could result in denial of service, information disclosure or bypass of security rules. https://security-tracker.debian.org/tracker/DSA-6367-1
CSIRTS triage
- What
- Multiple vulnerabilities in dnsdist could lead to denial of service, information disclosure, or bypass of security rules.
- Who is affected
- Deployments of dnsdist are affected.
- Urgency
- Remediation is important due to the potential for service disruption and security breaches.
- Action
- Apply the latest security update for dnsdist.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
Advisory coverage (1)
- unknownDSA-6367-1 dnsdist - security updatedebian · 2026-06-25
External references
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[](https://www.csirts.com/cve/CVE-2026-40208)