What is CVE-2026-3119?

CVE-2026-3119 is a medium-severity vulnerability in Isc Bind, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-03-25.

How severe is CVE-2026-3119?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Isc Bind

CVE-2026-3119

Under certain conditions, `named` may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature (TSIG) from a key declared in the `named` configuration. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.

EPSS: 0.006 (44.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Isc Bind
Isc Bind 9 — versions 9.20.0, 9.21.0, 9.20.9-S1

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

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

Frequently asked questions

What is CVE-2026-3119?: CVE-2026-3119 is a medium-severity vulnerability in Isc Bind, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-03-25.
How severe is CVE-2026-3119?: Medium severity. CVSS v3 base score is 6.5 out of 10.