ISC BIND 9 vulnerabilities: known CVEs & security history
ISC · DNS · 8 tracked CVEs · 0 actively exploited · updated August 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all ISC BIND 9 release lines — 8 in total. A CVE here doesn't mean your version is affected — check ISC BIND 9's current status and the safe version to run.
Known ISC BIND 9 CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-5947 | high | 7.5 | 1% | 2026 |
| CVE-2026-5946 | high | 7.5 | 2% | 2026 |
| CVE-2026-3039 | high | 7.5 | 1% | 2026 |
| CVE-2026-3104 | high | 7.5 | 1% | 2026 |
| CVE-2026-1519 | high | 7.5 | 2% | 2026 |
| CVE-2026-3593 | high | 7.4 | 2% | 2026 |
| CVE-2026-5950 | medium | 5.3 | 1% | 2026 |
| CVE-2026-3592 | medium | 5.3 | 0% | 2026 |
Is my ISC BIND 9 version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your ISC BIND 9 version → · Monitor ISC BIND 9 for new CVEs →
ISC BIND 9 vulnerabilities — frequently asked
How many known vulnerabilities does ISC BIND 9 have?
IsItPatched tracks 8 CVEs for ISC BIND 9. 0 are critical-severity and 6 high-severity. These span every release line — what matters is whether the version you run is affected.
Does ISC BIND 9 have any actively-exploited vulnerabilities?
None of ISC BIND 9's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe ISC BIND 9 vulnerability?
Among tracked issues, CVE-2026-5947 (HIGH, CVSS 7.5) ranks highest — a CWE-362 weakness.
Is ISC BIND 9 safe to use?
It depends on the version. The latest supported ISC BIND 9 release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: ISC BIND 9 security status · ISC BIND 9 end-of-life · actively-exploited CVEs. Always verify against ISC's advisories — see our disclaimer.