CVE-2026-13204
highIf a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may ex…
Vendor / product: Isc — bind
If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (security-officer@isc.org)
Timeline (UTC)
Published: 2026-07-22 15:16
Modified: 2026-11-02 17:49
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-11-03 07:34 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
isc / bind ≥9.11.0 ≤9.18.50, ≥9.11.3 ≤9.18.50, ≥9.20.0 ≤9.20.24, ≥9.20.9 ≤9.20.24, ≥9.21.0 ≤9.21.23
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://kb.isc.org/docs/cve-2026-13204
References
- https://downloads.isc.org/isc/bind9/9.20.26 security-officer@isc.org
- https://downloads.isc.org/isc/bind9/9.21.24 security-officer@isc.org
- https://kb.isc.org/docs/cve-2026-13204 security-officer@isc.org
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 07:34 UTC · record ↗