CVE-2026-1519
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Excessive NSEC3 iterations cause high CPU load during insecure delegation validation
If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
BIND 9
- Vendor
- ISC
- Product
- BIND 9
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 9.11.0 | affected | custom | Unavailable | 9.16.50 | None listed |
| 9.18.0 | affected | custom | Unavailable | 9.18.46 | None listed |
| 9.20.0 | affected | custom | Unavailable | 9.20.20 | None listed |
| 9.21.0 | affected | custom | Unavailable | 9.21.19 | None listed |
| 9.11.3-S1 | affected | custom | Unavailable | 9.16.50-S1 | None listed |
| 9.18.11-S1 | affected | custom | Unavailable | 9.18.46-S1 | None listed |
| 9.20.9-S1 | affected | custom | Unavailable | 9.20.20-S1 | None listed |