What is CVE-2026-3039?

CVE-2026-3039 is a high-severity vulnerability in Isc Bind, classified under CWE-771. CVSS score: 7.5/10. Published 2026-05-20.

How severe is CVE-2026-3039?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Isc Bind

CVE-2026-3039

BIND servers that are configured to use TKEY-based authentication via GSS-API tokens are vulnerable to excessive memory consumption when receiving and processing maliciously-constructed packets. Typically these servers will be found in Ac…

EPSS: 0.001 (26.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Isc Bind
Isc Bind 9 — versions 9.0.0, 9.18.0, 9.20.0

Weakness classification (CWE)

CWE-771

References

security-officer@isc.org (Patch, patch)
security-officer@isc.org (Patch, patch)
security-officer@isc.org (Patch, patch)
security-officer@isc.org (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-3039?: CVE-2026-3039 is a high-severity vulnerability in Isc Bind, classified under CWE-771. CVSS score: 7.5/10. Published 2026-05-20.
How severe is CVE-2026-3039?: High severity. CVSS v3 base score is 7.5 out of 10.