# CVE-2026-5950

> An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

- **CVSS:** 5.3 (MEDIUM)
- **EPSS:** 0.1%
- **CWE:** CWE-606

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-5950
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